{"id":17929,"date":"2021-12-17T11:30:41","date_gmt":"2021-12-17T04:30:41","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=17929"},"modified":"2021-12-17T16:00:21","modified_gmt":"2021-12-17T09:00:21","slug":"cac-phep-toan-tap-hop","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/cac-phep-toan-tap-hop\/","title":{"rendered":"C\u00c1C PH\u00c9P TO\u00c1N T\u1eacP H\u1ee2P"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><strong>I \u2013 LY\u0301 THUY\u00ca\u0301T<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>I \u2013 GIAO C\u1ee6A HAI T\u1eacP H\u1ee2P<br><\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eadp h\u1ee3p <img decoding=\"async\" width=\"20\" height=\"21\" class=\"wp-image-17930\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_256.png\" alt=\"IMG_256\"> g\u1ed3m c\u00e1c ph\u1ea7n t\u1eed v\u1eeba thu\u1ed9c <img decoding=\"async\" width=\"22\" height=\"22\" class=\"wp-image-17931\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_257.png\" alt=\"IMG_257\"> v\u1eeba thu\u1ed9c <img decoding=\"async\" width=\"20\" height=\"20\" class=\"wp-image-17932\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_258.png\" alt=\"IMG_258\"> \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 giao c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"20\" class=\"wp-image-17933\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_259.png\" alt=\"IMG_259\"> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"22\" height=\"21\" class=\"wp-image-17934\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_260.png\" alt=\"IMG_260\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img loading=\"lazy\" decoding=\"async\" width=\"162\" height=\"127\" class=\"wp-image-17935\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_261.jpeg\" alt=\"IMG_261\"> K\u00ed hi\u1ec7u <img loading=\"lazy\" decoding=\"async\" width=\"76\" height=\"21\" class=\"wp-image-17936\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_262.png\" alt=\"IMG_262\"> (ph\u1ea7n g\u1ea1ch ch\u00e9o trong h\u00ecnh).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1eady <img loading=\"lazy\" decoding=\"async\" width=\"187\" height=\"29\" class=\"wp-image-17937\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_263.png\" alt=\"IMG_263\"><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"141\" height=\"51\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_264.png\" alt=\"IMG_264\" class=\"wp-image-17938\"\/><\/figure>\n\n\n\n<br>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>II \u2013 H\u1ee2P C\u1ee6A HAI T\u1eacP H\u1ee2P<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"21\" class=\"wp-image-17939\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_265.png\" alt=\"IMG_265\"> g\u1ed3m c\u00e1c ph\u1ea7n t\u1eed thu\u1ed9c <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"20\" class=\"wp-image-17940\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_266.png\" alt=\"IMG_266\"> ho\u1eb7c thu\u1ed9c <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"20\" class=\"wp-image-17941\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_267.png\" alt=\"IMG_267\"> \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 h\u1ee3p c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"20\" class=\"wp-image-17942\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_268.png\" alt=\"IMG_268\"> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"20\" class=\"wp-image-17943\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_269.png\" alt=\"IMG_269\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img loading=\"lazy\" decoding=\"async\" width=\"147\" height=\"144\" class=\"wp-image-17944\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_270.jpeg\" alt=\"IMG_270\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_270.jpeg 147w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_270-50x50.jpeg 50w\" sizes=\"(max-width: 147px) 100vw, 147px\" \/> K\u00ed hi\u1ec7u <img loading=\"lazy\" decoding=\"async\" width=\"76\" height=\"21\" class=\"wp-image-17945\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_271.png\" alt=\"IMG_271\"> (ph\u1ea7n g\u1ea1ch ch\u00e9o trong h\u00ecnh).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1eady <img loading=\"lazy\" decoding=\"async\" width=\"216\" height=\"29\" class=\"wp-image-17946\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_272.png\" alt=\"IMG_272\"><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"138\" height=\"51\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_273.png\" alt=\"IMG_273\" class=\"wp-image-17947\"\/><\/figure>\n\n\n\n<br>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>III \u2013 HI\u1ec6U V\u00c0 PH\u1ea6N B\u00d9 C\u1ee6A HAI T\u1eacP H\u1ee2P<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"21\" class=\"wp-image-17948\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_274.png\" alt=\"IMG_274\"> g\u1ed3m c\u00e1c ph\u1ea7n t\u1eed thu\u1ed9c <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"20\" class=\"wp-image-17949\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_275.png\" alt=\"IMG_275\"> nh\u01b0ng kh\u00f4ng thu\u1ed9c <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"20\" class=\"wp-image-17950\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_276.png\" alt=\"IMG_276\"> g\u1ecdi l\u00e0 hi\u1ec7u c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"20\" class=\"wp-image-17951\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_277.png\" alt=\"IMG_277\"> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"22\" height=\"21\" class=\"wp-image-17952\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_278.png\" alt=\"IMG_278\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img loading=\"lazy\" decoding=\"async\" width=\"165\" height=\"125\" class=\"wp-image-17953\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_279.jpeg\" alt=\"IMG_279\"> K\u00ed hi\u1ec7u <img loading=\"lazy\" decoding=\"async\" width=\"76\" height=\"26\" class=\"wp-image-17954\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_280.png\" alt=\"IMG_280\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1eady <img loading=\"lazy\" decoding=\"async\" width=\"244\" height=\"29\" class=\"wp-image-17955\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_281.png\" alt=\"IMG_281\"><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"140\" height=\"51\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_282.png\" alt=\"IMG_282\" class=\"wp-image-17956\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Khi <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"21\" class=\"wp-image-17957\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_283.png\" alt=\"IMG_283\"> th\u00ec <img loading=\"lazy\" decoding=\"async\" width=\"46\" height=\"26\" class=\"wp-image-17958\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_284.png\" alt=\"IMG_284\"> g\u1ecdi l\u00e0 ph\u1ea7n b\u00f9 c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"20\" class=\"wp-image-17959\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_285.png\" alt=\"IMG_285\"> trong <img loading=\"lazy\" decoding=\"async\" width=\"22\" height=\"22\" class=\"wp-image-17960\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_286.png\" alt=\"IMG_286\"> k\u00ed hi\u1ec7u <img loading=\"lazy\" decoding=\"async\" width=\"40\" height=\"25\" class=\"wp-image-17961\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_287.png\" alt=\"IMG_287\"><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"141\" height=\"130\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_288.jpeg\" alt=\"IMG_288\" class=\"wp-image-17962\"\/><\/figure>\n\n\n\n<br>\n\n\n\n<br>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>II \u2013 DA\u0323NG TOA\u0301N<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. Da\u0323ng 1: <\/strong>X\u00e1c \u0111\u1ecbnh t\u1eadp h\u1ee3p b\u1eb1ng c\u00e1ch li\u1ec7t k\u00ea<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ph\u01b0\u01a1ng pha\u0301p gia\u0309i.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u00fang ta s\u1ebd gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh ho\u1eb7c b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh sau \u0111\u00f3 so s\u00e1nh v\u1edbi \u0111i\u1ec1u ki\u1ec7n ban \u0111\u1ea7u c\u1ee7a t\u1eadp h\u1ee3p.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>A. V\u00cd D\u1ee4 MINH H\u1eccA<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 1: <\/strong>Li\u1ec7t k\u00ea c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"239\" height=\"40\" class=\"wp-image-17963\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_289.png\" alt=\"IMG_289\"><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><img loading=\"lazy\" decoding=\"async\" width=\"91\" height=\"57\" class=\"wp-image-17964\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_290.png\" alt=\"IMG_290\"> . <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"65\" height=\"34\" class=\"wp-image-17965\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_291.png\" alt=\"IMG_291\"> . <strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"105\" height=\"57\" class=\"wp-image-17966\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_292.png\" alt=\"IMG_292\"> . <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"60\" height=\"24\" class=\"wp-image-17967\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_293.png\" alt=\"IMG_293\"> .<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n A.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong>Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"215\" height=\"84\" class=\"wp-image-17968\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_294.png\" alt=\"IMG_294\"> . Hai nghi\u1ec7m n\u00e0y \u0111\u1ec1u thu\u1ed9c <img loading=\"lazy\" decoding=\"async\" width=\"22\" height=\"22\" class=\"wp-image-17969\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_295.png\" alt=\"IMG_295\"> .<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 2: <\/strong>Nh\u1eadp v\u00e0o m\u00e1y t\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"144\" height=\"26\" class=\"wp-image-17970\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_296.png\" alt=\"IMG_296\"> sau \u0111\u00f3 \u1ea5n Calc l\u1ea7n l\u01b0\u1ee3t c\u00e1c \u0111\u00e1p \u00e1n, \u0111\u00e1p \u00e1n c\u00e2u n\u00e0o l\u00e0m ph\u01b0\u01a1ng tr\u00ecnh b\u1eb1ng 0 th\u00ec ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 2: <\/strong>Li\u1ec7t k\u00ea c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"191\" height=\"37\" class=\"wp-image-17971\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_297.png\" alt=\"IMG_297\"><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><img loading=\"lazy\" decoding=\"async\" width=\"99\" height=\"33\" class=\"wp-image-17972\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_298.png\" alt=\"IMG_298\"> . <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"34\" class=\"wp-image-17973\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_299.png\" alt=\"IMG_299\"> . <strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"101\" height=\"33\" class=\"wp-image-17974\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_300.png\" alt=\"IMG_300\"> . <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"60\" height=\"24\" class=\"wp-image-17975\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_301.png\" alt=\"IMG_301\"> .<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n C.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong>Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"240\" height=\"53\" class=\"wp-image-17976\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_302.png\" alt=\"IMG_302\"> M\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"19\" class=\"wp-image-17977\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_303.png\" alt=\"IMG_303\"> l\u00e0 c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean n\u00ean ch\u1ecdn c\u00e2u C.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 2: <\/strong>Nh\u1eadn x\u00e9t c\u00e1c ph\u1ea7n t\u1eed \u1edf c\u00e1c \u0111\u00e1p \u00e1n A, B, C l\u1ea7n l\u01b0\u1ee3t thay c\u00e1c ph\u1ea7n t\u1eed \u1edf c\u00e1c \u0111\u00e1p \u00e1n th\u1ebf v\u00e0o b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh, t\u1ea5t c\u1ea3 c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a \u0111\u00e1p \u00e1n n\u00e0o th\u1ecfa y\u00eau c\u1ea7u b\u00e0i to\u00e1n th\u00ec ta s\u1ebd ch\u1ecdn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 3: <\/strong>Li\u1ec7t k\u00ea c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"204\" height=\"71\" class=\"wp-image-17978\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_304.png\" alt=\"IMG_304\"><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><img loading=\"lazy\" decoding=\"async\" width=\"116\" height=\"33\" class=\"wp-image-17979\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_305.png\" alt=\"IMG_305\"> . <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"82\" height=\"34\" class=\"wp-image-17980\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_306.png\" alt=\"IMG_306\"> . <strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"101\" height=\"33\" class=\"wp-image-17981\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_307.png\" alt=\"IMG_307\"> . <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"60\" height=\"24\" class=\"wp-image-17982\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_308.png\" alt=\"IMG_308\"> .<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong>Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"323\" height=\"111\" class=\"wp-image-17983\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_309.png\" alt=\"IMG_309\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_309.png 323w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_309-300x103.png 300w\" sizes=\"(max-width: 323px) 100vw, 323px\" \/><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"19\" class=\"wp-image-17984\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_310.png\" alt=\"IMG_310\"> l\u00e0 c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean n\u00ean ch\u1ecdn c\u00e2u B.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 2: <\/strong>Nh\u1eadn x\u00e9t c\u00e1c ph\u1ea7n t\u1eed \u1edf c\u00e1c \u0111\u00e1p \u00e1n A, B, C l\u1ea7n l\u01b0\u1ee3t thay c\u00e1c ph\u1ea7n t\u1eed \u1edf c\u00e1c \u0111\u00e1p \u00e1n th\u1ebf v\u00e0o b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh, t\u1ea5t c\u1ea3 c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a \u0111\u00e1p \u00e1n n\u00e0o th\u1ecfa y\u00eau c\u1ea7u b\u00e0i to\u00e1n th\u00ec ta s\u1ebd ch\u1ecdn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 4: <\/strong>Li\u1ec7t k\u00ea c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"319\" height=\"41\" class=\"wp-image-17985\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_311.png\" alt=\"IMG_311\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_311.png 319w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_311-300x39.png 300w\" sizes=\"(max-width: 319px) 100vw, 319px\" \/><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><img loading=\"lazy\" decoding=\"async\" width=\"116\" height=\"33\" class=\"wp-image-17986\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_312.png\" alt=\"IMG_312\"> . <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"116\" height=\"34\" class=\"wp-image-17987\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_313.png\" alt=\"IMG_313\"> .<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"64\" height=\"23\" class=\"wp-image-17988\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_314.png\" alt=\"IMG_314\"> <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"142\" height=\"34\" class=\"wp-image-17989\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_315.png\" alt=\"IMG_315\"> .<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n D.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong>Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"485\" height=\"128\" class=\"wp-image-17990\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_316.png\" alt=\"IMG_316\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_316.png 485w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_316-300x79.png 300w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_316-480x128.png 480w\" sizes=\"(max-width: 485px) 100vw, 485px\" \/><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"19\" class=\"wp-image-17991\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_317.png\" alt=\"IMG_317\"> l\u00e0 c\u00e1c s\u1ed1 nguy\u00ean n\u00ean ch\u1ecdn c\u00e2u D.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 2: <\/strong>Nh\u1eadn x\u00e9t c\u00e1c ph\u1ea7n t\u1eed \u1edf c\u00e1c \u0111\u00e1p \u00e1n A, B, C l\u1ea7n l\u01b0\u1ee3t thay c\u00e1c ph\u1ea7n t\u1eed \u1edf c\u00e1c \u0111\u00e1p \u00e1n th\u1ebf v\u00e0o b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh, t\u1ea5t c\u1ea3 c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a \u0111\u00e1p \u00e1n n\u00e0o th\u1ecfa y\u00eau c\u1ea7u b\u00e0i to\u00e1n th\u00ec ta s\u1ebd ch\u1ecdn.<\/p>\n\n\n\n<br>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>B. B\u00c0I T\u1eacP T\u1ef0 LUY\u1ec6N <\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>NH\u00c2\u0323N BI\u00ca\u0301T.<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Li\u1ec7t k\u00ea c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"204\" height=\"37\" class=\"wp-image-17992\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_318.png\" alt=\"IMG_318\"><\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"33\" class=\"wp-image-17993\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_319.png\" alt=\"IMG_319\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"68\" height=\"33\" class=\"wp-image-17994\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_320.png\" alt=\"IMG_320\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"33\" class=\"wp-image-17995\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_321.png\" alt=\"IMG_321\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"25\" height=\"24\" class=\"wp-image-17996\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_322.png\" alt=\"IMG_322\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>TH\u00d4NG HI\u00ca\u0309U.<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Li\u1ec7t k\u00ea c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"228\" height=\"37\" class=\"wp-image-17997\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_323.png\" alt=\"IMG_323\"><\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"64\" height=\"33\" class=\"wp-image-17998\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_324.png\" alt=\"IMG_324\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"92\" height=\"33\" class=\"wp-image-17999\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_325.png\" alt=\"IMG_325\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"96\" height=\"33\" class=\"wp-image-18000\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_326.png\" alt=\"IMG_326\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"25\" height=\"24\" class=\"wp-image-18001\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_327.png\" alt=\"IMG_327\"><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Li\u1ec7t k\u00ea c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"310\" height=\"40\" class=\"wp-image-18002\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_328.png\" alt=\"IMG_328\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_328.png 310w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_328-300x39.png 300w\" sizes=\"(max-width: 310px) 100vw, 310px\" \/><\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"85\" height=\"57\" class=\"wp-image-18003\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_329.png\" alt=\"IMG_329\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"59\" height=\"57\" class=\"wp-image-18004\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_330.png\" alt=\"IMG_330\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"60\" height=\"33\" class=\"wp-image-18005\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_331.png\" alt=\"IMG_331\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"25\" height=\"24\" class=\"wp-image-18006\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_332.png\" alt=\"IMG_332\"><\/p>\n\n\n\n<br>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>V\u00c2\u0323N DU\u0323NG.<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Li\u1ec7t k\u00ea c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"317\" height=\"37\" class=\"wp-image-18007\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_333.png\" alt=\"IMG_333\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_333.png 317w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_333-300x35.png 300w\" sizes=\"(max-width: 317px) 100vw, 317px\" \/><\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"33\" class=\"wp-image-18008\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_334.png\" alt=\"IMG_334\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"100\" height=\"33\" class=\"wp-image-18009\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_335.png\" alt=\"IMG_335\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"100\" height=\"33\" class=\"wp-image-18010\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_336.png\" alt=\"IMG_336\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"25\" height=\"24\" class=\"wp-image-18011\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_337.png\" alt=\"IMG_337\"><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>C. \u0110\u00c1P \u00c1N PH\u1ea6N B\u00c0I T\u1eacP T\u1ef0 LUY\u1ec6N<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 1. A<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 2. B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 3. B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 4. C<\/strong><\/p>\n\n\n\n<br>\n\n\n\n<br>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. Da\u0323ng 2: <\/strong>X\u00e1c \u0111\u1ecbnh t\u1eadp h\u1ee3p b\u1eb1ng c\u00e1ch ch\u1ec9 ra t\u00ednh ch\u1ea5t \u0111\u1eb7c tr\u01b0ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 1: <\/strong>T\u00ednh ch\u1ea5t \u0111\u1eb7c tr\u01b0ng c\u1ee7a t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"138\" height=\"33\" class=\"wp-image-18012\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_338.png\" alt=\"IMG_338\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"117\" height=\"37\" class=\"wp-image-18013\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_339.png\" alt=\"IMG_339\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"124\" height=\"37\" class=\"wp-image-18014\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_340.png\" alt=\"IMG_340\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"116\" height=\"37\" class=\"wp-image-18015\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_341.png\" alt=\"IMG_341\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"117\" height=\"37\" class=\"wp-image-18016\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_342.png\" alt=\"IMG_342\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n A.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta li\u1ec7t k\u00ea c\u00e1c ph\u1ea7n t\u1eed t\u1eebng \u0111\u00e1p \u00e1n, \u0111\u00e1p \u00e1n n\u00e0o th\u1ecfa y\u00eau c\u1ea7u b\u00e0i to\u00e1n ta s\u1ebd ch\u1ecdn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 2: <\/strong>T\u00ednh ch\u1ea5t \u0111\u1eb7c tr\u01b0ng c\u1ee7a t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"204\" height=\"33\" class=\"wp-image-18017\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_343.png\" alt=\"IMG_343\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"122\" height=\"40\" class=\"wp-image-18018\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_344.png\" alt=\"IMG_344\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"124\" height=\"40\" class=\"wp-image-18019\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_345.png\" alt=\"IMG_345\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"124\" height=\"40\" class=\"wp-image-18020\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_346.png\" alt=\"IMG_346\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"157\" height=\"37\" class=\"wp-image-18021\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_347.png\" alt=\"IMG_347\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n A.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta li\u1ec7t k\u00ea c\u00e1c ph\u1ea7n t\u1eed t\u1eebng \u0111\u00e1p \u00e1n, \u0111\u00e1p \u00e1n n\u00e0o th\u1ecfa y\u00eau c\u1ea7u b\u00e0i to\u00e1n ta s\u1ebd ch\u1ecdn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 3: <\/strong>T\u00ednh ch\u1ea5t \u0111\u1eb7c tr\u01b0ng c\u1ee7a t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"184\" height=\"57\" class=\"wp-image-18022\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_348.png\" alt=\"IMG_348\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"191\" height=\"60\" class=\"wp-image-18023\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_349.png\" alt=\"IMG_349\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"202\" height=\"60\" class=\"wp-image-18024\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_350.png\" alt=\"IMG_350\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"226\" height=\"60\" class=\"wp-image-18025\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_351.png\" alt=\"IMG_351\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"226\" height=\"60\" class=\"wp-image-18026\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_352.png\" alt=\"IMG_352\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta li\u1ec7t k\u00ea c\u00e1c ph\u1ea7n t\u1eed t\u1eebng \u0111\u00e1p \u00e1n, \u0111\u00e1p \u00e1n n\u00e0o th\u1ecfa y\u00eau c\u1ea7u b\u00e0i to\u00e1n ta s\u1ebd ch\u1ecdn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 4: <\/strong>T\u00ednh ch\u1ea5t \u0111\u1eb7c tr\u01b0ng c\u1ee7a t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"196\" height=\"57\" class=\"wp-image-18027\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_353.png\" alt=\"IMG_353\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"240\" height=\"64\" class=\"wp-image-18028\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_354.png\" alt=\"IMG_354\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"240\" height=\"64\" class=\"wp-image-18029\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_355.png\" alt=\"IMG_355\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"239\" height=\"64\" class=\"wp-image-18030\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_356.png\" alt=\"IMG_356\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"248\" height=\"64\" class=\"wp-image-18031\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_357.png\" alt=\"IMG_357\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta li\u1ec7t k\u00ea c\u00e1c ph\u1ea7n t\u1eed t\u1eebng \u0111\u00e1p \u00e1n, \u0111\u00e1p \u00e1n n\u00e0o th\u1ecfa y\u00eau c\u1ea7u b\u00e0i to\u00e1n ta s\u1ebd ch\u1ecdn.<\/p>\n\n\n\n<br>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>B. B\u00c0I T\u1eacP T\u1ef0 LUY\u1ec6N <\/strong><\/h4>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>NH\u00c2\u0323N BI\u00ca\u0301T.<\/strong><\/h4>\n\n\n\n<ol class=\"wp-block-list\"><li>T\u00ednh ch\u1ea5t \u0111\u1eb7c tr\u01b0ng c\u1ee7a t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"176\" height=\"33\" class=\"wp-image-18032\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_358.png\" alt=\"IMG_358\"><\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"156\" height=\"37\" class=\"wp-image-18033\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_359.png\" alt=\"IMG_359\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_359.png 156w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_359-150x37.png 150w\" sizes=\"(max-width: 156px) 100vw, 156px\" \/> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"157\" height=\"37\" class=\"wp-image-18034\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_360.png\" alt=\"IMG_360\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"157\" height=\"37\" class=\"wp-image-18035\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_361.png\" alt=\"IMG_361\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"180\" height=\"37\" class=\"wp-image-18036\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_362.png\" alt=\"IMG_362\"><\/p>\n\n\n\n<br>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>TH\u00d4NG HI\u00ca\u0309U.<\/strong><\/h4>\n\n\n\n<ol class=\"wp-block-list\"><li>T\u00ednh ch\u1ea5t \u0111\u1eb7c tr\u01b0ng c\u1ee7a t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"219\" height=\"33\" class=\"wp-image-18037\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_363.png\" alt=\"IMG_363\"><\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"179\" height=\"40\" class=\"wp-image-18038\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_364.png\" alt=\"IMG_364\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"185\" height=\"40\" class=\"wp-image-18039\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_365.png\" alt=\"IMG_365\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"219\" height=\"37\" class=\"wp-image-18040\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_366.png\" alt=\"IMG_366\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"219\" height=\"37\" class=\"wp-image-18041\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_367.png\" alt=\"IMG_367\"><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>T\u00ednh ch\u1ea5t \u0111\u1eb7c tr\u01b0ng c\u1ee7a t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"231\" height=\"57\" class=\"wp-image-18042\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_368.png\" alt=\"IMG_368\"><\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"212\" height=\"67\" class=\"wp-image-18043\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_369.png\" alt=\"IMG_369\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"211\" height=\"67\" class=\"wp-image-18044\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_370.png\" alt=\"IMG_370\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"222\" height=\"67\" class=\"wp-image-18045\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_371.png\" alt=\"IMG_371\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"219\" height=\"67\" class=\"wp-image-18046\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_372.png\" alt=\"IMG_372\"><\/p>\n\n\n\n<br>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>V\u00c2\u0323N DU\u0323NG.<\/strong><\/h4>\n\n\n\n<ol class=\"wp-block-list\"><li>T\u00ednh ch\u1ea5t \u0111\u1eb7c tr\u01b0ng c\u1ee7a t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"197\" height=\"57\" class=\"wp-image-18047\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_373.png\" alt=\"IMG_373\"><\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"242\" height=\"71\" class=\"wp-image-18048\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_374.png\" alt=\"IMG_374\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"236\" height=\"71\" class=\"wp-image-18049\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_375.png\" alt=\"IMG_375\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"237\" height=\"71\" class=\"wp-image-18050\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_376.png\" alt=\"IMG_376\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"237\" height=\"71\" class=\"wp-image-18051\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_377.png\" alt=\"IMG_377\"><\/p>\n\n\n\n<br>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>C. \u0110\u00c1P \u00c1N PH\u1ea6N B\u00c0I T\u1eacP T\u1ef0 LUY\u1ec6N<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 5. A<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 6. A<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 7. D<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 8. C<\/strong><\/p>\n\n\n\n<br>\n\n\n\n<br>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. Da\u0323ng 3: <\/strong>T\u00ecm giao c\u1ee7a c\u00e1c t\u1eadp h\u1ee3p<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 1: <\/strong>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"264\" height=\"33\" class=\"wp-image-18052\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_378.png\" alt=\"IMG_378\"> khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"56\" height=\"22\" class=\"wp-image-18053\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_379.png\" alt=\"IMG_379\"> l\u00e0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"54\" height=\"33\" class=\"wp-image-18054\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_380.png\" alt=\"IMG_380\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"152\" height=\"33\" class=\"wp-image-18055\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_381.png\" alt=\"IMG_381\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_381.png 152w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_381-150x33.png 150w\" sizes=\"(max-width: 152px) 100vw, 152px\" \/> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"65\" height=\"33\" class=\"wp-image-18056\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_382.png\" alt=\"IMG_382\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"46\" height=\"33\" class=\"wp-image-18057\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_383.png\" alt=\"IMG_383\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n A.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta t\u00ecm ph\u1ea7n chung c\u1ee7a c\u1ea3 hai t\u1eadp h\u1ee3p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 2: <\/strong>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"409\" height=\"40\" class=\"wp-image-18058\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_384.png\" alt=\"IMG_384\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_384.png 409w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_384-300x29.png 300w\" sizes=\"(max-width: 409px) 100vw, 409px\" \/> khi \u0111\u00f3:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"139\" height=\"33\" class=\"wp-image-18059\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_385.png\" alt=\"IMG_385\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"102\" height=\"33\" class=\"wp-image-18060\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_386.png\" alt=\"IMG_386\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"162\" height=\"57\" class=\"wp-image-18061\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_387.png\" alt=\"IMG_387\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"122\" height=\"33\" class=\"wp-image-18062\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_388.png\" alt=\"IMG_388\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong>Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"209\" height=\"84\" class=\"wp-image-18063\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_389.png\" alt=\"IMG_389\"> . m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"48\" height=\"23\" class=\"wp-image-18064\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_390.png\" alt=\"IMG_390\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"60\" height=\"33\" class=\"wp-image-18065\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_391.png\" alt=\"IMG_391\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"158\" height=\"53\" class=\"wp-image-18066\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_392.png\" alt=\"IMG_392\"> . m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18067\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_393.png\" alt=\"IMG_393\"> n\u00ean ch\u1ecdn <img loading=\"lazy\" decoding=\"async\" width=\"96\" height=\"33\" class=\"wp-image-18068\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_394.png\" alt=\"IMG_394\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"102\" height=\"34\" class=\"wp-image-18069\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_395.png\" alt=\"IMG_395\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 2: <\/strong>Ta th\u1eed t\u1eebng ph\u1ea7n t\u1eed c\u1ee7a c\u00e1c \u0111\u00e1p \u00e1n, n\u1ebfu th\u1ecfa y\u00eau c\u1ea7u b\u00e0i to\u00e1n c\u1ee7a c\u1ea3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"40\" height=\"28\" class=\"wp-image-18070\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_396.png\" alt=\"IMG_396\"> th\u00ec \u0111\u00f3 l\u00e0 \u0111\u00e1p \u00e1n \u0111\u00fang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 3: <\/strong>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"541\" height=\"42\" class=\"wp-image-18071\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_397.png\" alt=\"IMG_397\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_397.png 541w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_397-300x23.png 300w\" sizes=\"(max-width: 541px) 100vw, 541px\" \/> khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"93\" height=\"22\" class=\"wp-image-18072\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_398.png\" alt=\"IMG_398\"> l\u00e0:<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><img loading=\"lazy\" decoding=\"async\" width=\"60\" height=\"23\" class=\"wp-image-18073\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_399.png\" alt=\"IMG_399\"> . <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"85\" height=\"34\" class=\"wp-image-18074\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_400.png\" alt=\"IMG_400\"> .<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"116\" height=\"33\" class=\"wp-image-18075\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_401.png\" alt=\"IMG_401\"> <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"142\" height=\"34\" class=\"wp-image-18076\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_402.png\" alt=\"IMG_402\"> .<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n C.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong>Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"244\" height=\"128\" class=\"wp-image-18077\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_403.png\" alt=\"IMG_403\"> . m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"48\" height=\"23\" class=\"wp-image-18078\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_404.png\" alt=\"IMG_404\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"136\" height=\"33\" class=\"wp-image-18079\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_405.png\" alt=\"IMG_405\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"236\" height=\"53\" class=\"wp-image-18080\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_406.png\" alt=\"IMG_406\"> . m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"48\" height=\"23\" class=\"wp-image-18081\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_407.png\" alt=\"IMG_407\"> n\u00ean ch\u1ecdn <img loading=\"lazy\" decoding=\"async\" width=\"104\" height=\"33\" class=\"wp-image-18082\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_408.png\" alt=\"IMG_408\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"145\" height=\"34\" class=\"wp-image-18083\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_409.png\" alt=\"IMG_409\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 2: <\/strong>Ta th\u1eed t\u1eebng ph\u1ea7n t\u1eed c\u1ee7a c\u00e1c \u0111\u00e1p \u00e1n, n\u1ebfu th\u1ecfa y\u00eau c\u1ea7u b\u00e0i to\u00e1n c\u1ee7a c\u1ea3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"40\" height=\"28\" class=\"wp-image-18084\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_410.png\" alt=\"IMG_410\"> th\u00ec \u0111\u00f3 l\u00e0 \u0111\u00e1p \u00e1n \u0111\u00fang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 4: <\/strong>Cho ba t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"229\" height=\"37\" class=\"wp-image-18085\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_411.png\" alt=\"IMG_411\"> <img loading=\"lazy\" decoding=\"async\" width=\"206\" height=\"37\" class=\"wp-image-18086\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_412.png\" alt=\"IMG_412\"> <img loading=\"lazy\" decoding=\"async\" width=\"199\" height=\"47\" class=\"wp-image-18087\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_413.png\" alt=\"IMG_413\"> khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"91\" height=\"24\" class=\"wp-image-18088\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_414.png\" alt=\"IMG_414\"> l\u00e0:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"64\" height=\"33\" class=\"wp-image-18089\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_415.png\" alt=\"IMG_415\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"81\" height=\"33\" class=\"wp-image-18090\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_416.png\" alt=\"IMG_416\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"33\" class=\"wp-image-18091\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_417.png\" alt=\"IMG_417\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"33\" height=\"33\" class=\"wp-image-18092\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_418.png\" alt=\"IMG_418\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n D.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong>Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"199\" height=\"60\" class=\"wp-image-18093\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_419.png\" alt=\"IMG_419\"> m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18094\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_420.png\" alt=\"IMG_420\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"33\" class=\"wp-image-18095\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_421.png\" alt=\"IMG_421\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"214\" height=\"53\" class=\"wp-image-18096\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_422.png\" alt=\"IMG_422\"> . m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"48\" height=\"23\" class=\"wp-image-18097\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_423.png\" alt=\"IMG_423\"> n\u00ean ch\u1ecdn <img loading=\"lazy\" decoding=\"async\" width=\"104\" height=\"33\" class=\"wp-image-18098\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_424.png\" alt=\"IMG_424\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"170\" height=\"60\" class=\"wp-image-18099\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_425.png\" alt=\"IMG_425\"> m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18100\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_426.png\" alt=\"IMG_426\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"79\" height=\"33\" class=\"wp-image-18101\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_427.png\" alt=\"IMG_427\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"138\" height=\"34\" class=\"wp-image-18102\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_428.png\" alt=\"IMG_428\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 2: <\/strong>Ta th\u1eed t\u1eebng ph\u1ea7n t\u1eed c\u1ee7a c\u00e1c \u0111\u00e1p \u00e1n, n\u1ebfu th\u1ecfa y\u00eau c\u1ea7u b\u00e0i to\u00e1n c\u1ee7a c\u1ea3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"63\" height=\"28\" class=\"wp-image-18103\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_429.png\" alt=\"IMG_429\"> th\u00ec \u0111\u00f3 l\u00e0 \u0111\u00e1p \u00e1n \u0111\u00fang.<\/p>\n\n\n\n<br>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>B. B\u00c0I T\u1eacP T\u1ef0 LUY\u1ec6N <\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>NH\u00c2\u0323N BI\u00ca\u0301T.<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"317\" height=\"33\" class=\"wp-image-18104\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_430.png\" alt=\"IMG_430\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_430.png 317w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_430-300x31.png 300w\" sizes=\"(max-width: 317px) 100vw, 317px\" \/> khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"56\" height=\"22\" class=\"wp-image-18105\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_431.png\" alt=\"IMG_431\"><\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"244\" height=\"33\" class=\"wp-image-18106\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_432.png\" alt=\"IMG_432\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"132\" height=\"33\" class=\"wp-image-18107\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_433.png\" alt=\"IMG_433\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"141\" height=\"33\" class=\"wp-image-18108\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_434.png\" alt=\"IMG_434\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"33\" class=\"wp-image-18109\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_435.png\" alt=\"IMG_435\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>TH\u00d4NG HI\u00ca\u0309U.<\/strong><\/p>\n\n\n\n<br>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"436\" height=\"43\" class=\"wp-image-18110\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_436.png\" alt=\"IMG_436\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_436.png 436w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_436-300x30.png 300w\" sizes=\"(max-width: 436px) 100vw, 436px\" \/> khi \u0111\u00f3<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"141\" height=\"57\" class=\"wp-image-18111\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_437.png\" alt=\"IMG_437\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"102\" height=\"33\" class=\"wp-image-18112\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_438.png\" alt=\"IMG_438\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"119\" height=\"33\" class=\"wp-image-18113\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_439.png\" alt=\"IMG_439\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"91\" height=\"24\" class=\"wp-image-18114\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_440.png\" alt=\"IMG_440\"><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"527\" height=\"46\" class=\"wp-image-18115\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_441.png\" alt=\"IMG_441\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_441.png 527w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_441-300x26.png 300w\" sizes=\"(max-width: 527px) 100vw, 527px\" \/> khi \u0111\u00f3<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"160\" height=\"57\" class=\"wp-image-18116\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_442.png\" alt=\"IMG_442\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"102\" height=\"33\" class=\"wp-image-18117\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_443.png\" alt=\"IMG_443\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"177\" height=\"57\" class=\"wp-image-18118\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_444.png\" alt=\"IMG_444\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"145\" height=\"33\" class=\"wp-image-18119\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_445.png\" alt=\"IMG_445\"><\/p>\n\n\n\n<br>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>V\u00c2\u0323N DU\u0323NG.<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho <img loading=\"lazy\" decoding=\"async\" width=\"522\" height=\"50\" class=\"wp-image-18120\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_446.png\" alt=\"IMG_446\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_446.png 522w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_446-300x29.png 300w\" sizes=\"(max-width: 522px) 100vw, 522px\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"197\" height=\"50\" class=\"wp-image-18121\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_447.png\" alt=\"IMG_447\"> Khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"91\" height=\"24\" class=\"wp-image-18122\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_448.png\" alt=\"IMG_448\"><\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"259\" height=\"33\" class=\"wp-image-18123\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_449.png\" alt=\"IMG_449\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"187\" height=\"33\" class=\"wp-image-18124\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_450.png\" alt=\"IMG_450\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"137\" height=\"33\" class=\"wp-image-18125\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_451.png\" alt=\"IMG_451\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"201\" height=\"33\" class=\"wp-image-18126\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_452.png\" alt=\"IMG_452\"><\/p>\n\n\n\n<br>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. \u0110\u00c1P \u00c1N PH\u1ea6N B\u00c0I T\u1eacP T\u1ef0 LUY\u1ec6N<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 9. D<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 10. D<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 11. B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 12. C<\/strong><\/p>\n\n\n\n<br>\n\n\n\n<br>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4. Da\u0323ng 4: <\/strong>T\u00ecm h\u1ee3p c\u1ee7a c\u00e1c t\u1eadp h\u1ee3p<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 1: <\/strong>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"256\" height=\"33\" class=\"wp-image-18127\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_453.png\" alt=\"IMG_453\"> khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"56\" height=\"22\" class=\"wp-image-18128\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_454.png\" alt=\"IMG_454\"> l\u00e0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"54\" height=\"33\" class=\"wp-image-18129\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_455.png\" alt=\"IMG_455\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"142\" height=\"33\" class=\"wp-image-18130\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_456.png\" alt=\"IMG_456\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"65\" height=\"33\" class=\"wp-image-18131\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_457.png\" alt=\"IMG_457\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"37\" height=\"33\" class=\"wp-image-18132\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_458.png\" alt=\"IMG_458\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta t\u00ecm t\u1ea5t c\u1ea3 c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a c\u1ea3 hai t\u1eadp h\u1ee3p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 2: <\/strong>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"419\" height=\"40\" class=\"wp-image-18133\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_459.png\" alt=\"IMG_459\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_459.png 419w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_459-300x29.png 300w\" sizes=\"(max-width: 419px) 100vw, 419px\" \/> khi \u0111\u00f3:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"163\" height=\"57\" class=\"wp-image-18134\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_460.png\" alt=\"IMG_460\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"102\" height=\"33\" class=\"wp-image-18135\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_461.png\" alt=\"IMG_461\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"138\" height=\"33\" class=\"wp-image-18136\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_462.png\" alt=\"IMG_462\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"122\" height=\"33\" class=\"wp-image-18137\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_463.png\" alt=\"IMG_463\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n A.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong>Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"209\" height=\"84\" class=\"wp-image-18138\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_464.png\" alt=\"IMG_464\"> . m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18139\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_465.png\" alt=\"IMG_465\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"89\" height=\"56\" class=\"wp-image-18140\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_466.png\" alt=\"IMG_466\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"165\" height=\"53\" class=\"wp-image-18141\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_467.png\" alt=\"IMG_467\"> . m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18142\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_468.png\" alt=\"IMG_468\"> n\u00ean ch\u1ecdn <img loading=\"lazy\" decoding=\"async\" width=\"96\" height=\"33\" class=\"wp-image-18143\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_469.png\" alt=\"IMG_469\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"163\" height=\"57\" class=\"wp-image-18144\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_470.png\" alt=\"IMG_470\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 2: <\/strong>Ta th\u1eed t\u1eebng ph\u1ea7n t\u1eed c\u1ee7a c\u00e1c \u0111\u00e1p \u00e1n, n\u1ebfu th\u1ecfa y\u00eau c\u1ea7u b\u00e0i to\u00e1n c\u1ee7a c\u1ea3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18145\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_471.png\" alt=\"IMG_471\"> ho\u1eb7c <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18146\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_472.png\" alt=\"IMG_472\"> th\u00ec \u0111\u00f3 l\u00e0 \u0111\u00e1p \u00e1n \u0111\u00fang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 3: <\/strong>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"539\" height=\"42\" class=\"wp-image-18147\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_473.png\" alt=\"IMG_473\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_473.png 539w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_473-300x23.png 300w\" sizes=\"(max-width: 539px) 100vw, 539px\" \/> khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"93\" height=\"22\" class=\"wp-image-18148\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_474.png\" alt=\"IMG_474\"> l\u00e0:<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><img loading=\"lazy\" decoding=\"async\" width=\"60\" height=\"23\" class=\"wp-image-18149\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_475.png\" alt=\"IMG_475\"> . <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"85\" height=\"34\" class=\"wp-image-18150\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_476.png\" alt=\"IMG_476\"> .<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"116\" height=\"33\" class=\"wp-image-18151\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_477.png\" alt=\"IMG_477\"> <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"142\" height=\"34\" class=\"wp-image-18152\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_478.png\" alt=\"IMG_478\"> .<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n D.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong>Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"244\" height=\"128\" class=\"wp-image-18153\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_479.png\" alt=\"IMG_479\"> . m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"48\" height=\"23\" class=\"wp-image-18154\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_480.png\" alt=\"IMG_480\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"136\" height=\"33\" class=\"wp-image-18155\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_481.png\" alt=\"IMG_481\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"232\" height=\"24\" class=\"wp-image-18156\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_482.png\" alt=\"IMG_482\"> . m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"48\" height=\"23\" class=\"wp-image-18157\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_483.png\" alt=\"IMG_483\"> n\u00ean ch\u1ecdn <img loading=\"lazy\" decoding=\"async\" width=\"104\" height=\"33\" class=\"wp-image-18158\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_484.png\" alt=\"IMG_484\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"174\" height=\"34\" class=\"wp-image-18159\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_485.png\" alt=\"IMG_485\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 2: <\/strong>Ta th\u1eed t\u1eebng ph\u1ea7n t\u1eed c\u1ee7a c\u00e1c \u0111\u00e1p \u00e1n, n\u1ebfu th\u1ecfa y\u00eau c\u1ea7u b\u00e0i to\u00e1n c\u1ee7a c\u1ea3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18160\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_486.png\" alt=\"IMG_486\"> ho\u1eb7c <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18161\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_487.png\" alt=\"IMG_487\"> th\u00ec \u0111\u00f3 l\u00e0 \u0111\u00e1p \u00e1n \u0111\u00fang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 4: <\/strong>Cho ba t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"625\" height=\"47\" class=\"wp-image-18162\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_488.png\" alt=\"IMG_488\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_488.png 625w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_488-300x23.png 300w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/> khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"91\" height=\"24\" class=\"wp-image-18163\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_489.png\" alt=\"IMG_489\"> l\u00e0:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"33\" class=\"wp-image-18164\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_490.png\" alt=\"IMG_490\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"96\" height=\"33\" class=\"wp-image-18165\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_491.png\" alt=\"IMG_491\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"33\" class=\"wp-image-18166\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_492.png\" alt=\"IMG_492\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"33\" height=\"33\" class=\"wp-image-18167\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_493.png\" alt=\"IMG_493\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong>Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"201\" height=\"60\" class=\"wp-image-18168\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_494.png\" alt=\"IMG_494\"> m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18169\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_495.png\" alt=\"IMG_495\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"33\" class=\"wp-image-18170\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_496.png\" alt=\"IMG_496\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"214\" height=\"53\" class=\"wp-image-18171\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_497.png\" alt=\"IMG_497\"> . m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"48\" height=\"23\" class=\"wp-image-18172\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_498.png\" alt=\"IMG_498\"> n\u00ean ch\u1ecdn <img loading=\"lazy\" decoding=\"async\" width=\"104\" height=\"33\" class=\"wp-image-18173\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_499.png\" alt=\"IMG_499\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"170\" height=\"60\" class=\"wp-image-18174\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_500.png\" alt=\"IMG_500\"> m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18175\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_501.png\" alt=\"IMG_501\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"79\" height=\"33\" class=\"wp-image-18176\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_502.png\" alt=\"IMG_502\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"33\" class=\"wp-image-18177\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_503.png\" alt=\"IMG_503\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 2: <\/strong>Ta th\u1eed t\u1eebng ph\u1ea7n t\u1eed c\u1ee7a c\u00e1c \u0111\u00e1p \u00e1n, n\u1ebfu th\u1ecfa y\u00eau c\u1ea7u b\u00e0i to\u00e1n c\u1ee7a c\u1ea3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18178\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_504.png\" alt=\"IMG_504\"> ho\u1eb7c <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18179\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_505.png\" alt=\"IMG_505\"> ho\u1eb7c <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"24\" class=\"wp-image-18180\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_506.png\" alt=\"IMG_506\"> th\u00ec \u0111\u00f3 l\u00e0 \u0111\u00e1p \u00e1n \u0111\u00fang.<\/p>\n\n\n\n<br>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B. B\u00c0I T\u1eacP T\u1ef0 LUY\u1ec6N <\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>NH\u00c2\u0323N BI\u00ca\u0301T.<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"244\" height=\"33\" class=\"wp-image-18181\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_507.png\" alt=\"IMG_507\"> khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"56\" height=\"22\" class=\"wp-image-18182\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_508.png\" alt=\"IMG_508\"><\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"120\" height=\"33\" class=\"wp-image-18183\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_509.png\" alt=\"IMG_509\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"177\" height=\"33\" class=\"wp-image-18184\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_510.png\" alt=\"IMG_510\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"135\" height=\"33\" class=\"wp-image-18185\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_511.png\" alt=\"IMG_511\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"205\" height=\"33\" class=\"wp-image-18186\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_512.png\" alt=\"IMG_512\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>TH\u00d4NG HI\u00ca\u0309U.<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"437\" height=\"43\" class=\"wp-image-18187\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_513.png\" alt=\"IMG_513\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_513.png 437w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_513-300x30.png 300w\" sizes=\"(max-width: 437px) 100vw, 437px\" \/> khi \u0111\u00f3<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"157\" height=\"57\" class=\"wp-image-18188\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_514.png\" alt=\"IMG_514\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"116\" height=\"33\" class=\"wp-image-18189\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_515.png\" alt=\"IMG_515\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"132\" height=\"33\" class=\"wp-image-18190\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_516.png\" alt=\"IMG_516\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"91\" height=\"24\" class=\"wp-image-18191\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_517.png\" alt=\"IMG_517\"><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"529\" height=\"46\" class=\"wp-image-18192\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_518.png\" alt=\"IMG_518\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_518.png 529w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_518-300x26.png 300w\" sizes=\"(max-width: 529px) 100vw, 529px\" \/> khi \u0111\u00f3<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"157\" height=\"57\" class=\"wp-image-18193\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_519.png\" alt=\"IMG_519\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"216\" height=\"57\" class=\"wp-image-18194\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_520.png\" alt=\"IMG_520\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"162\" height=\"33\" class=\"wp-image-18195\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_521.png\" alt=\"IMG_521\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"91\" height=\"24\" class=\"wp-image-18196\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_522.png\" alt=\"IMG_522\"><\/p>\n\n\n\n<br>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>V\u00c2\u0323N DU\u0323NG.<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho <img loading=\"lazy\" decoding=\"async\" width=\"522\" height=\"50\" class=\"wp-image-18197\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_523.png\" alt=\"IMG_523\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_523.png 522w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_523-300x29.png 300w\" sizes=\"(max-width: 522px) 100vw, 522px\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"273\" height=\"50\" class=\"wp-image-18198\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_524.png\" alt=\"IMG_524\"> Khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"91\" height=\"24\" class=\"wp-image-18199\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_525.png\" alt=\"IMG_525\"><\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"259\" height=\"33\" class=\"wp-image-18200\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_526.png\" alt=\"IMG_526\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"229\" height=\"33\" class=\"wp-image-18201\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_527.png\" alt=\"IMG_527\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"277\" height=\"33\" class=\"wp-image-18202\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_528.png\" alt=\"IMG_528\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"167\" height=\"33\" class=\"wp-image-18203\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_529.png\" alt=\"IMG_529\"><\/p>\n\n\n\n<br>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. \u0110\u00c1P \u00c1N PH\u1ea6N B\u00c0I T\u1eacP T\u1ef0 LUY\u1ec6N<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 13. D<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 14. A<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 15. B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 16. C<\/strong><\/p>\n\n\n\n<br>\n\n\n\n<br>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>5. Da\u0323ng 5: <\/strong>T\u00ecm hi\u1ec7u, ph\u1ea7n b\u00f9 c\u1ee7a c\u00e1c t\u1eadp h\u1ee3p<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 1: <\/strong>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"268\" height=\"33\" class=\"wp-image-18204\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_530.png\" alt=\"IMG_530\"> khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"48\" height=\"23\" class=\"wp-image-18205\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_531.png\" alt=\"IMG_531\"> l\u00e0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"82\" height=\"33\" class=\"wp-image-18206\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_532.png\" alt=\"IMG_532\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"93\" height=\"33\" class=\"wp-image-18207\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_533.png\" alt=\"IMG_533\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"37\" height=\"33\" class=\"wp-image-18208\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_534.png\" alt=\"IMG_534\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"98\" height=\"33\" class=\"wp-image-18209\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_535.png\" alt=\"IMG_535\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta t\u00ecm t\u1ea5t c\u1ea3 c\u00e1c ph\u1ea7n t\u1eed m\u00e0 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18210\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_536.png\" alt=\"IMG_536\"> c\u00f3 m\u00e0 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18211\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_537.png\" alt=\"IMG_537\"> kh\u00f4ng c\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 2: <\/strong>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"426\" height=\"40\" class=\"wp-image-18212\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_538.png\" alt=\"IMG_538\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_538.png 426w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_538-300x28.png 300w\" sizes=\"(max-width: 426px) 100vw, 426px\" \/> khi \u0111\u00f3:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"153\" height=\"57\" class=\"wp-image-18213\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_539.png\" alt=\"IMG_539\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_539.png 153w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_539-150x57.png 150w\" sizes=\"(max-width: 153px) 100vw, 153px\" \/> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"120\" height=\"57\" class=\"wp-image-18214\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_540.png\" alt=\"IMG_540\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"106\" height=\"56\" class=\"wp-image-18215\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_541.png\" alt=\"IMG_541\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"114\" height=\"33\" class=\"wp-image-18216\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_542.png\" alt=\"IMG_542\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n C.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong>Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"209\" height=\"84\" class=\"wp-image-18217\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_543.png\" alt=\"IMG_543\"> . m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18218\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_544.png\" alt=\"IMG_544\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"89\" height=\"56\" class=\"wp-image-18219\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_545.png\" alt=\"IMG_545\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"162\" height=\"24\" class=\"wp-image-18220\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_546.png\" alt=\"IMG_546\"> . m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18221\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_547.png\" alt=\"IMG_547\"> n\u00ean ch\u1ecdn <img loading=\"lazy\" decoding=\"async\" width=\"94\" height=\"33\" class=\"wp-image-18222\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_548.png\" alt=\"IMG_548\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"106\" height=\"57\" class=\"wp-image-18223\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_549.png\" alt=\"IMG_549\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 2: <\/strong>Ta th\u1eed t\u1eebng ph\u1ea7n t\u1eed c\u1ee7a c\u00e1c \u0111\u00e1p \u00e1n, n\u1ebfu th\u1ecfa y\u00eau c\u1ea7u b\u00e0i to\u00e1n c\u1ee7a t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18224\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_550.png\" alt=\"IMG_550\"> m\u00e0 kh\u00f4ng thu\u1ed9c t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18225\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_551.png\" alt=\"IMG_551\"> th\u00ec \u0111\u00f3 l\u00e0 \u0111\u00e1p \u00e1n \u0111\u00fang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 3: <\/strong>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"539\" height=\"42\" class=\"wp-image-18226\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_552.png\" alt=\"IMG_552\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_552.png 539w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_552-300x23.png 300w\" sizes=\"(max-width: 539px) 100vw, 539px\" \/> khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"23\" class=\"wp-image-18227\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_553.png\" alt=\"IMG_553\"> l\u00e0:<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><img loading=\"lazy\" decoding=\"async\" width=\"60\" height=\"23\" class=\"wp-image-18228\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_554.png\" alt=\"IMG_554\"> . <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"85\" height=\"34\" class=\"wp-image-18229\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_555.png\" alt=\"IMG_555\"> .<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"116\" height=\"33\" class=\"wp-image-18230\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_556.png\" alt=\"IMG_556\"> <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"142\" height=\"34\" class=\"wp-image-18231\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_557.png\" alt=\"IMG_557\"> .<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong>Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"244\" height=\"128\" class=\"wp-image-18232\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_558.png\" alt=\"IMG_558\"> . m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"48\" height=\"23\" class=\"wp-image-18233\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_559.png\" alt=\"IMG_559\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"136\" height=\"33\" class=\"wp-image-18234\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_560.png\" alt=\"IMG_560\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"232\" height=\"24\" class=\"wp-image-18235\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_561.png\" alt=\"IMG_561\"> . m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"48\" height=\"23\" class=\"wp-image-18236\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_562.png\" alt=\"IMG_562\"> n\u00ean ch\u1ecdn <img loading=\"lazy\" decoding=\"async\" width=\"104\" height=\"33\" class=\"wp-image-18237\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_563.png\" alt=\"IMG_563\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"109\" height=\"34\" class=\"wp-image-18238\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_564.png\" alt=\"IMG_564\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 2: <\/strong>Ta th\u1eed t\u1eebng ph\u1ea7n t\u1eed c\u1ee7a c\u00e1c \u0111\u00e1p \u00e1n, n\u1ebfu th\u1ecfa y\u00eau c\u1ea7u b\u00e0i to\u00e1n c\u1ee7a t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18239\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_565.png\" alt=\"IMG_565\"> m\u00e0 kh\u00f4ng thu\u1ed9c t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18240\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_566.png\" alt=\"IMG_566\"> th\u00ec \u0111\u00f3 l\u00e0 \u0111\u00e1p \u00e1n \u0111\u00fang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 4: <\/strong>Cho ba t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"713\" height=\"50\" class=\"wp-image-18241\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_567.png\" alt=\"IMG_567\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_567.png 713w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_567-300x21.png 300w\" sizes=\"(max-width: 713px) 100vw, 713px\" \/> khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"88\" height=\"28\" class=\"wp-image-18242\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_568.png\" alt=\"IMG_568\"> l\u00e0:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"33\" class=\"wp-image-18243\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_569.png\" alt=\"IMG_569\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"96\" height=\"33\" class=\"wp-image-18244\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_570.png\" alt=\"IMG_570\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"33\" class=\"wp-image-18245\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_571.png\" alt=\"IMG_571\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"37\" height=\"33\" class=\"wp-image-18246\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_572.png\" alt=\"IMG_572\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n D.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong>Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"201\" height=\"60\" class=\"wp-image-18247\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_573.png\" alt=\"IMG_573\"> m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18248\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_574.png\" alt=\"IMG_574\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"33\" class=\"wp-image-18249\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_575.png\" alt=\"IMG_575\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"214\" height=\"53\" class=\"wp-image-18250\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_576.png\" alt=\"IMG_576\"> . m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"48\" height=\"23\" class=\"wp-image-18251\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_577.png\" alt=\"IMG_577\"> n\u00ean ch\u1ecdn <img loading=\"lazy\" decoding=\"async\" width=\"103\" height=\"33\" class=\"wp-image-18252\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_578.png\" alt=\"IMG_578\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"187\" height=\"93\" class=\"wp-image-18253\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_579.png\" alt=\"IMG_579\"> m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18254\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_580.png\" alt=\"IMG_580\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"93\" height=\"33\" class=\"wp-image-18255\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_581.png\" alt=\"IMG_581\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"133\" height=\"34\" class=\"wp-image-18256\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_582.png\" alt=\"IMG_582\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 2: <\/strong>Ta th\u1eed t\u1eebng ph\u1ea7n t\u1eed c\u1ee7a c\u00e1c \u0111\u00e1p \u00e1n, n\u1ebfu th\u1ecfa y\u00eau c\u1ea7u b\u00e0i to\u00e1n c\u1ee7a t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18257\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_583.png\" alt=\"IMG_583\"> m\u00e0 kh\u00f4ng thu\u1ed9c t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18258\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_584.png\" alt=\"IMG_584\"> v\u00e0 kh\u00f4ng thu\u1ed9c t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18259\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_585.png\" alt=\"IMG_585\"> th\u00ec \u0111\u00f3 l\u00e0 \u0111\u00e1p \u00e1n \u0111\u00fang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 5: <\/strong>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"296\" height=\"33\" class=\"wp-image-18260\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_586.png\" alt=\"IMG_586\"> khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"42\" height=\"30\" class=\"wp-image-18261\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_587.png\" alt=\"IMG_587\"> l\u00e0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"85\" height=\"33\" class=\"wp-image-18262\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_588.png\" alt=\"IMG_588\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"56\" height=\"33\" class=\"wp-image-18263\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_589.png\" alt=\"IMG_589\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"33\" class=\"wp-image-18264\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_590.png\" alt=\"IMG_590\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"86\" height=\"33\" class=\"wp-image-18265\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_591.png\" alt=\"IMG_591\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n C.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta t\u00ecm t\u1ea5t c\u1ea3 c\u00e1c ph\u1ea7n t\u1eed m\u00e0 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18266\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_592.png\" alt=\"IMG_592\"> c\u00f3 m\u00e0 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18267\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_593.png\" alt=\"IMG_593\"> kh\u00f4ng c\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 6: <\/strong>Cho t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"199\" height=\"37\" class=\"wp-image-18268\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_594.png\" alt=\"IMG_594\"> khi \u0111\u00f3:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"140\" height=\"33\" class=\"wp-image-18269\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_595.png\" alt=\"IMG_595\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"157\" height=\"33\" class=\"wp-image-18270\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_596.png\" alt=\"IMG_596\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_596.png 157w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_596-150x33.png 150w\" sizes=\"(max-width: 157px) 100vw, 157px\" \/><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"124\" height=\"33\" class=\"wp-image-18271\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_597.png\" alt=\"IMG_597\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"124\" height=\"33\" class=\"wp-image-18272\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_598.png\" alt=\"IMG_598\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"162\" height=\"24\" class=\"wp-image-18273\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_599.png\" alt=\"IMG_599\"> . m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18274\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_600.png\" alt=\"IMG_600\"> n\u00ean ch\u1ecdn <img loading=\"lazy\" decoding=\"async\" width=\"179\" height=\"33\" class=\"wp-image-18275\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_601.png\" alt=\"IMG_601\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi \u0111\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"218\" height=\"33\" class=\"wp-image-18276\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_602.png\" alt=\"IMG_602\"><\/p>\n\n\n\n<br>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B. B\u00c0I T\u1eacP T\u1ef0 LUY\u1ec6N <\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>NH\u00c2\u0323N BI\u00ca\u0301T.<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"244\" height=\"33\" class=\"wp-image-18277\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_603.png\" alt=\"IMG_603\"> khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"48\" height=\"23\" class=\"wp-image-18278\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_604.png\" alt=\"IMG_604\"><\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"113\" height=\"33\" class=\"wp-image-18279\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_605.png\" alt=\"IMG_605\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"169\" height=\"33\" class=\"wp-image-18280\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_606.png\" alt=\"IMG_606\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"115\" height=\"33\" class=\"wp-image-18281\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_607.png\" alt=\"IMG_607\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"197\" height=\"33\" class=\"wp-image-18282\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_608.png\" alt=\"IMG_608\"><\/p>\n\n\n\n<br>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>TH\u00d4NG HI\u00ca\u0309U.<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"504\" height=\"43\" class=\"wp-image-18283\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_609.png\" alt=\"IMG_609\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_609.png 504w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_609-300x26.png 300w\" sizes=\"(max-width: 504px) 100vw, 504px\" \/> khi \u0111\u00f3<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"165\" height=\"57\" class=\"wp-image-18284\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_610.png\" alt=\"IMG_610\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"132\" height=\"57\" class=\"wp-image-18285\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_611.png\" alt=\"IMG_611\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"124\" height=\"33\" class=\"wp-image-18286\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_612.png\" alt=\"IMG_612\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"83\" height=\"24\" class=\"wp-image-18287\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_613.png\" alt=\"IMG_613\"><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"528\" height=\"46\" class=\"wp-image-18288\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_614.png\" alt=\"IMG_614\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_614.png 528w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_614-300x26.png 300w\" sizes=\"(max-width: 528px) 100vw, 528px\" \/> khi \u0111\u00f3<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"131\" height=\"57\" class=\"wp-image-18289\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_615.png\" alt=\"IMG_615\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"208\" height=\"57\" class=\"wp-image-18290\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_616.png\" alt=\"IMG_616\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"154\" height=\"33\" class=\"wp-image-18291\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_617.png\" alt=\"IMG_617\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_617.png 154w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_617-150x33.png 150w\" sizes=\"(max-width: 154px) 100vw, 154px\" \/> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"94\" height=\"34\" class=\"wp-image-18292\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_618.png\" alt=\"IMG_618\"><\/p>\n\n\n\n<br>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>V\u00c2\u0323N DU\u0323NG.<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho <img loading=\"lazy\" decoding=\"async\" width=\"522\" height=\"50\" class=\"wp-image-18293\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_619.png\" alt=\"IMG_619\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_619.png 522w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_619-300x29.png 300w\" sizes=\"(max-width: 522px) 100vw, 522px\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"273\" height=\"50\" class=\"wp-image-18294\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_620.png\" alt=\"IMG_620\"> Khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"88\" height=\"28\" class=\"wp-image-18295\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_621.png\" alt=\"IMG_621\"><\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"226\" height=\"33\" class=\"wp-image-18296\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_622.png\" alt=\"IMG_622\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"226\" height=\"33\" class=\"wp-image-18297\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_623.png\" alt=\"IMG_623\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"196\" height=\"33\" class=\"wp-image-18298\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_624.png\" alt=\"IMG_624\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"152\" height=\"33\" class=\"wp-image-18299\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_625.png\" alt=\"IMG_625\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_625.png 152w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_625-150x33.png 150w\" sizes=\"(max-width: 152px) 100vw, 152px\" \/><\/p>\n\n\n\n<br>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. \u0110\u00c1P \u00c1N PH\u1ea6N B\u00c0I T\u1eacP T\u1ef0 LUY\u1ec6N<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 17. C<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 18. B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 19. A<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 20. D<\/strong><\/p>\n\n\n\n<br>\n\n\n\n<br>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>6. Da\u0323ng 6: <\/strong>T\u00ecm t\u1eadp con c\u1ee7a t\u1eadp h\u1ee3p<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 1: <\/strong>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"197\" height=\"33\" class=\"wp-image-18300\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_626.png\" alt=\"IMG_626\"> . T\u00ecm m\u1ec7nh \u0111\u1ec1 <strong>sai<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"60\" height=\"23\" class=\"wp-image-18301\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_627.png\" alt=\"IMG_627\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"60\" height=\"23\" class=\"wp-image-18302\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_628.png\" alt=\"IMG_628\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"60\" height=\"23\" class=\"wp-image-18303\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_629.png\" alt=\"IMG_629\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"60\" height=\"23\" class=\"wp-image-18304\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_630.png\" alt=\"IMG_630\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ecbnh ngh\u0129a t\u1eadp h\u1ee3p con.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 2: <\/strong>Cho t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"99\" height=\"38\" class=\"wp-image-18305\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_631.png\" alt=\"IMG_631\"> khi \u0111\u00f3 t\u1eadp h\u1ee3p A c\u00f3 t\u1ea5t c\u1ea3 bao nhi\u00eau t\u1eadp con.<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"23\" class=\"wp-image-18306\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_632.png\" alt=\"IMG_632\"> . <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"15\" height=\"24\" class=\"wp-image-18307\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_633.png\" alt=\"IMG_633\"> .<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"23\" class=\"wp-image-18308\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_634.png\" alt=\"IMG_634\"> <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"15\" height=\"24\" class=\"wp-image-18309\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_635.png\" alt=\"IMG_635\"> .<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong>Li\u1ec7t k\u00ea c\u00e1c t\u1eadp con c\u1ee7a t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18310\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_636.png\" alt=\"IMG_636\"> l\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"347\" height=\"33\" class=\"wp-image-18311\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_637.png\" alt=\"IMG_637\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_637.png 347w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_637-300x29.png 300w\" sizes=\"(max-width: 347px) 100vw, 347px\" \/> do \u0111\u00f3 ch\u1ecdn B.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 2: <\/strong>S\u1ed1 t\u1ea5t c\u1ea3 c\u00e1c t\u1eadp con c\u1ee7a t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18312\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_638.png\" alt=\"IMG_638\"> c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"19\" class=\"wp-image-18313\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_639.png\" alt=\"IMG_639\"> ph\u1ea7n t\u1eed c\u00f3 c\u00f4ng th\u1ee9c <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"28\" class=\"wp-image-18314\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_640.png\" alt=\"IMG_640\"> Do \u0111\u00f3 d\u00f9ng m\u00e1y t\u00ednh \u1ea5n <img loading=\"lazy\" decoding=\"async\" width=\"56\" height=\"32\" class=\"wp-image-18315\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_641.png\" alt=\"IMG_641\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 3: <\/strong>Cho t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"197\" height=\"43\" class=\"wp-image-18316\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_642.png\" alt=\"IMG_642\"> . T\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18317\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_643.png\" alt=\"IMG_643\"> c\u00f3 t\u1ea5t c\u1ea3 bao nhi\u00eau t\u1eadp con kh\u00e1c r\u1ed7ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18318\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_644.png\" alt=\"IMG_644\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18319\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_645.png\" alt=\"IMG_645\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18320\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_646.png\" alt=\"IMG_646\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18321\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_647.png\" alt=\"IMG_647\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"279\" height=\"43\" class=\"wp-image-18322\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_648.png\" alt=\"IMG_648\"> Li\u1ec7t k\u00ea c\u00e1c t\u1eadp con c\u1ee7a t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18323\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_649.png\" alt=\"IMG_649\"> kh\u00e1c r\u1ed7ng l\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"144\" height=\"33\" class=\"wp-image-18324\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_650.png\" alt=\"IMG_650\"> <img loading=\"lazy\" decoding=\"async\" width=\"170\" height=\"33\" class=\"wp-image-18325\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_651.png\" alt=\"IMG_651\"> do \u0111\u00f3 ch\u1ecdn B.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 2: <\/strong>S\u1ed1 t\u1ea5t c\u1ea3 c\u00e1c t\u1eadp con c\u1ee7a t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18326\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_652.png\" alt=\"IMG_652\"> c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"19\" class=\"wp-image-18327\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_653.png\" alt=\"IMG_653\"> ph\u1ea7n t\u1eed c\u00f3 c\u00f4ng th\u1ee9c <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"28\" class=\"wp-image-18328\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_654.png\" alt=\"IMG_654\"> Do \u0111\u00f3 d\u00f9ng m\u00e1y t\u00ednh \u1ea5n <img loading=\"lazy\" decoding=\"async\" width=\"81\" height=\"32\" class=\"wp-image-18329\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_655.png\" alt=\"IMG_655\"> v\u00ec y\u00eau c\u1ea7u kh\u00e1c t\u1eadp r\u1ed7ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 4: <\/strong>Cho t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"101\" height=\"33\" class=\"wp-image-18330\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_656.png\" alt=\"IMG_656\"> T\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18331\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_657.png\" alt=\"IMG_657\"> c\u00f3 t\u1ea5t c\u1ea3 bao nhi\u00eau t\u1eadp con c\u00f3 \u0111\u00fang 3 ph\u1ea7n t\u1eed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18332\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_658.png\" alt=\"IMG_658\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"23\" class=\"wp-image-18333\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_659.png\" alt=\"IMG_659\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"23\" class=\"wp-image-18334\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_660.png\" alt=\"IMG_660\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18335\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_661.png\" alt=\"IMG_661\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n C.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 1: <\/strong>Li\u1ec7t k\u00ea c\u00e1c t\u1eadp con c\u1ee7a t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18336\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_662.png\" alt=\"IMG_662\"> c\u00f3 3 ph\u1ea7n t\u1eed l\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"256\" height=\"33\" class=\"wp-image-18337\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_663.png\" alt=\"IMG_663\"> do \u0111\u00f3 ch\u1ecdn C.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch 2: <\/strong>Cho t\u1eadp A c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"19\" class=\"wp-image-18338\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_664.png\" alt=\"IMG_664\"> ph\u1ea7n t\u1eed, s\u1ed1 t\u1eadp con c\u1ee7a t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18339\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_665.png\" alt=\"IMG_665\"> c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"24\" class=\"wp-image-18340\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_666.png\" alt=\"IMG_666\"> ph\u1ea7n t\u1eed c\u00f3 c\u00f4ng th\u1ee9c <img loading=\"lazy\" decoding=\"async\" width=\"32\" height=\"32\" class=\"wp-image-18341\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_667.png\" alt=\"IMG_667\"> Do \u0111\u00f3 d\u00f9ng m\u00e1y t\u00ednh \u1ea5n <img loading=\"lazy\" decoding=\"async\" width=\"60\" height=\"39\" class=\"wp-image-18342\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_668.png\" alt=\"IMG_668\"><\/p>\n\n\n\n<br>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B. B\u00c0I T\u1eacP T\u1ef0 LUY\u1ec6N <\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"117\" height=\"38\" class=\"wp-image-18343\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_669.png\" alt=\"IMG_669\"> khi \u0111\u00f3 t\u1eadp h\u1ee3p A c\u00f3 t\u1ea5t c\u1ea3 bao nhi\u00eau t\u1eadp con.<\/li><li><img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"22\" class=\"wp-image-18344\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_670.png\" alt=\"IMG_670\"> . <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"24\" class=\"wp-image-18345\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_671.png\" alt=\"IMG_671\"> .<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"23\" class=\"wp-image-18346\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_672.png\" alt=\"IMG_672\"> <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"25\" height=\"24\" class=\"wp-image-18347\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_673.png\" alt=\"IMG_673\"> .<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"305\" height=\"50\" class=\"wp-image-18348\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_674.png\" alt=\"IMG_674\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_674.png 305w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_674-300x49.png 300w\" sizes=\"(max-width: 305px) 100vw, 305px\" \/> Khi \u0111\u00f3 t\u1eadp h\u1ee3p A c\u00f3 t\u1ea5t c\u1ea3 bao nhi\u00eau t\u1eadp con kh\u00e1c r\u1ed7ng<\/li><li><img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"22\" class=\"wp-image-18349\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_675.png\" alt=\"IMG_675\"> . <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"24\" class=\"wp-image-18350\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_676.png\" alt=\"IMG_676\"> .<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18351\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_677.png\" alt=\"IMG_677\"> <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"15\" height=\"24\" class=\"wp-image-18352\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_678.png\" alt=\"IMG_678\"> .<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"117\" height=\"33\" class=\"wp-image-18353\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_679.png\" alt=\"IMG_679\"> T\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18354\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_680.png\" alt=\"IMG_680\"> c\u00f3 t\u1ea5t c\u1ea3 bao nhi\u00eau t\u1eadp con c\u00f3 \u0111\u00fang 3 ph\u1ea7n t\u1eed.<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"24\" class=\"wp-image-18355\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_681.png\" alt=\"IMG_681\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"24\" class=\"wp-image-18356\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_682.png\" alt=\"IMG_682\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18357\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_683.png\" alt=\"IMG_683\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"24\" class=\"wp-image-18358\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_684.png\" alt=\"IMG_684\"><\/p>\n\n\n\n<br>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>V\u00c2\u0323N DU\u0323NG.<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho <img loading=\"lazy\" decoding=\"async\" width=\"529\" height=\"50\" class=\"wp-image-18359\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_685.png\" alt=\"IMG_685\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_685.png 529w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_685-300x28.png 300w\" sizes=\"(max-width: 529px) 100vw, 529px\" \/> Khi \u0111\u00f3 t\u1eadp s\u1ed1 t\u1eadp con c\u00f3 2 ph\u1ea7n t\u1eed c\u1ee7a t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"96\" height=\"28\" class=\"wp-image-18360\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_686.png\" alt=\"IMG_686\"><\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"23\" class=\"wp-image-18361\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_687.png\" alt=\"IMG_687\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18362\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_688.png\" alt=\"IMG_688\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18363\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_689.png\" alt=\"IMG_689\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18364\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_690.png\" alt=\"IMG_690\"><\/p>\n\n\n\n<br>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. \u0110\u00c1P \u00c1N PH\u1ea6N B\u00c0I T\u1eacP T\u1ef0 LUY\u1ec6N<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 21. B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 22. B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 23. D<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 24. A<\/strong><\/p>\n\n\n\n<br>\n\n\n\n<br>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>7. Da\u0323ng 7: <\/strong>T\u00ecm t\u1eadp h\u1ee3p b\u1eb1ng nhau.<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 1: <\/strong>Cho t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"415\" height=\"43\" class=\"wp-image-18365\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_691.png\" alt=\"IMG_691\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_691.png 415w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_691-300x31.png 300w\" sizes=\"(max-width: 415px) 100vw, 415px\" \/> . T\u1eadp m\u1ec7nh \u0111\u1ec1 \u0111\u00fang<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"57\" height=\"23\" class=\"wp-image-18366\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_692.png\" alt=\"IMG_692\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"57\" height=\"23\" class=\"wp-image-18367\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_693.png\" alt=\"IMG_693\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"57\" height=\"23\" class=\"wp-image-18368\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_694.png\" alt=\"IMG_694\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"90\" height=\"23\" class=\"wp-image-18369\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_695.png\" alt=\"IMG_695\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"60\" class=\"wp-image-18370\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_696.png\" alt=\"IMG_696\"> m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18371\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_697.png\" alt=\"IMG_697\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"33\" class=\"wp-image-18372\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_698.png\" alt=\"IMG_698\"> do \u0111\u00f3 ch\u1ecdn \u0111\u00e1p \u00e1n B.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 2: <\/strong>Cho t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"527\" height=\"60\" class=\"wp-image-18373\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_699.png\" alt=\"IMG_699\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_699.png 527w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_699-300x34.png 300w\" sizes=\"(max-width: 527px) 100vw, 527px\" \/> . Khi \u0111\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"106\" height=\"33\" class=\"wp-image-18374\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_700.png\" alt=\"IMG_700\"> l\u00e0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"68\" height=\"33\" class=\"wp-image-18375\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_701.png\" alt=\"IMG_701\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"97\" height=\"33\" class=\"wp-image-18376\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_702.png\" alt=\"IMG_702\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"107\" height=\"56\" class=\"wp-image-18377\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_703.png\" alt=\"IMG_703\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"96\" height=\"56\" class=\"wp-image-18378\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_704.png\" alt=\"IMG_704\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"220\" height=\"93\" class=\"wp-image-18379\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_705.png\" alt=\"IMG_705\"> m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18380\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_706.png\" alt=\"IMG_706\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"120\" height=\"56\" class=\"wp-image-18381\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_707.png\" alt=\"IMG_707\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"204\" height=\"53\" class=\"wp-image-18382\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_708.png\" alt=\"IMG_708\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"148\" height=\"33\" class=\"wp-image-18383\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_709.png\" alt=\"IMG_709\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi \u0111\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"106\" height=\"33\" class=\"wp-image-18384\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_710.png\" alt=\"IMG_710\"> l\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"97\" height=\"33\" class=\"wp-image-18385\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_711.png\" alt=\"IMG_711\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 3: <\/strong>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"90\" height=\"33\" class=\"wp-image-18386\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_712.png\" alt=\"IMG_712\"> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"125\" height=\"31\" class=\"wp-image-18387\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_713.png\" alt=\"IMG_713\"> C\u00f3 bao nhi\u00eau t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"22\" height=\"19\" class=\"wp-image-18388\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_714.png\" alt=\"IMG_714\"> th\u1ecfa m\u00e3n <img loading=\"lazy\" decoding=\"async\" width=\"92\" height=\"23\" class=\"wp-image-18389\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_715.png\" alt=\"IMG_715\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18390\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_716.png\" alt=\"IMG_716\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"23\" class=\"wp-image-18391\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_717.png\" alt=\"IMG_717\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"23\" class=\"wp-image-18392\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_718.png\" alt=\"IMG_718\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18393\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_719.png\" alt=\"IMG_719\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n C.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Li\u1ec7t k\u00ea c\u00e1c t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"22\" class=\"wp-image-18394\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_720.png\" alt=\"IMG_720\"> th\u1ecfa <img loading=\"lazy\" decoding=\"async\" width=\"323\" height=\"33\" class=\"wp-image-18395\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_721.png\" alt=\"IMG_721\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_721.png 323w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_721-300x31.png 300w\" sizes=\"(max-width: 323px) 100vw, 323px\" \/> Do \u0111\u00f3 ch\u1ecdn C.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 4: <\/strong>Cho ba t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"583\" height=\"43\" class=\"wp-image-18396\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_722.png\" alt=\"IMG_722\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_722.png 583w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_722-300x22.png 300w\" sizes=\"(max-width: 583px) 100vw, 583px\" \/> . Khi \u0111\u00f3 t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"134\" height=\"33\" class=\"wp-image-18397\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_723.png\" alt=\"IMG_723\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"109\" height=\"33\" class=\"wp-image-18398\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_724.png\" alt=\"IMG_724\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"72\" height=\"33\" class=\"wp-image-18399\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_725.png\" alt=\"IMG_725\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"90\" height=\"33\" class=\"wp-image-18400\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_726.png\" alt=\"IMG_726\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"111\" height=\"33\" class=\"wp-image-18401\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_727.png\" alt=\"IMG_727\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"220\" height=\"93\" class=\"wp-image-18402\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_728.png\" alt=\"IMG_728\"> m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18403\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_729.png\" alt=\"IMG_729\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"122\" height=\"33\" class=\"wp-image-18404\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_730.png\" alt=\"IMG_730\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"259\" height=\"33\" class=\"wp-image-18405\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_731.png\" alt=\"IMG_731\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"173\" height=\"33\" class=\"wp-image-18406\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_732.png\" alt=\"IMG_732\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi \u0111\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"106\" height=\"33\" class=\"wp-image-18407\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_733.png\" alt=\"IMG_733\"> l\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"97\" height=\"33\" class=\"wp-image-18408\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_734.png\" alt=\"IMG_734\"><\/p>\n\n\n\n<br>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B. B\u00c0I T\u1eacP T\u1ef0 LUY\u1ec6N <\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"376\" height=\"43\" class=\"wp-image-18409\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_735.png\" alt=\"IMG_735\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_735.png 376w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_735-300x34.png 300w\" sizes=\"(max-width: 376px) 100vw, 376px\" \/> . T\u1eadp m\u1ec7nh \u0111\u1ec1 \u0111\u00fang<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"57\" height=\"23\" class=\"wp-image-18410\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_736.png\" alt=\"IMG_736\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"57\" height=\"23\" class=\"wp-image-18411\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_737.png\" alt=\"IMG_737\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"57\" height=\"23\" class=\"wp-image-18412\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_738.png\" alt=\"IMG_738\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"90\" height=\"23\" class=\"wp-image-18413\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_739.png\" alt=\"IMG_739\"><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"90\" height=\"33\" class=\"wp-image-18414\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_740.png\" alt=\"IMG_740\"> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"108\" height=\"31\" class=\"wp-image-18415\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_741.png\" alt=\"IMG_741\"> C\u00f3 bao nhi\u00eau t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"22\" height=\"19\" class=\"wp-image-18416\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_742.png\" alt=\"IMG_742\"> th\u1ecfa m\u00e3n <img loading=\"lazy\" decoding=\"async\" width=\"92\" height=\"23\" class=\"wp-image-18417\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_743.png\" alt=\"IMG_743\"><\/li><li><img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"22\" class=\"wp-image-18418\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_744.png\" alt=\"IMG_744\"> . <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"24\" class=\"wp-image-18419\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_745.png\" alt=\"IMG_745\"> .<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18420\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_746.png\" alt=\"IMG_746\"> <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"15\" height=\"24\" class=\"wp-image-18421\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_747.png\" alt=\"IMG_747\"> .<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho 2 t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"418\" height=\"40\" class=\"wp-image-18422\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_748.png\" alt=\"IMG_748\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_748.png 418w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_748-300x29.png 300w\" sizes=\"(max-width: 418px) 100vw, 418px\" \/> . Khi \u0111\u00f3 t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"183\" height=\"33\" class=\"wp-image-18423\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_749.png\" alt=\"IMG_749\"> l\u00e0<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"97\" height=\"58\" class=\"wp-image-18424\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_750.png\" alt=\"IMG_750\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"34\" class=\"wp-image-18425\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_751.png\" alt=\"IMG_751\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"97\" height=\"34\" class=\"wp-image-18426\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_752.png\" alt=\"IMG_752\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"93\" height=\"34\" class=\"wp-image-18427\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_753.png\" alt=\"IMG_753\"><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Cho 3 t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"405\" height=\"40\" class=\"wp-image-18428\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_754.png\" alt=\"IMG_754\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_754.png 405w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_754-300x30.png 300w\" sizes=\"(max-width: 405px) 100vw, 405px\" \/> , <img loading=\"lazy\" decoding=\"async\" width=\"303\" height=\"40\" class=\"wp-image-18429\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_755.png\" alt=\"IMG_755\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_755.png 303w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_755-300x40.png 300w\" sizes=\"(max-width: 303px) 100vw, 303px\" \/> Khi \u0111\u00f3 t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"193\" height=\"33\" class=\"wp-image-18430\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_756.png\" alt=\"IMG_756\"> l\u00e0<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"97\" height=\"58\" class=\"wp-image-18431\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_757.png\" alt=\"IMG_757\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"71\" height=\"34\" class=\"wp-image-18432\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_758.png\" alt=\"IMG_758\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"54\" height=\"34\" class=\"wp-image-18433\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_759.png\" alt=\"IMG_759\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"97\" height=\"58\" class=\"wp-image-18434\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_760.png\" alt=\"IMG_760\"><\/p>\n\n\n\n<br>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. \u0110\u00c1P \u00c1N PH\u1ea6N B\u00c0I T\u1eacP T\u1ef0 LUY\u1ec6N<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 25. C<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 26. A<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 27. B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 28. D<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>8. D\u1ea1ng 8<\/strong>: T\u00ecm tham s\u1ed1 m \u0111\u1ec3 th\u1ecfa y\u00eau c\u1ea7u v\u1ec1 c\u00e1c ph\u00e9p to\u00e1n<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323: <\/strong>Cho t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"340\" height=\"43\" class=\"wp-image-18435\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_761.png\" alt=\"IMG_761\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_761.png 340w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_761-300x38.png 300w\" sizes=\"(max-width: 340px) 100vw, 340px\" \/> . T\u00ecm <img loading=\"lazy\" decoding=\"async\" width=\"22\" height=\"19\" class=\"wp-image-18436\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_762.png\" alt=\"IMG_762\"> \u0111\u1ec3 <img loading=\"lazy\" decoding=\"async\" width=\"57\" height=\"23\" class=\"wp-image-18437\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_763.png\" alt=\"IMG_763\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"54\" height=\"23\" class=\"wp-image-18438\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_764.png\" alt=\"IMG_764\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"55\" height=\"23\" class=\"wp-image-18439\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_765.png\" alt=\"IMG_765\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"55\" height=\"23\" class=\"wp-image-18440\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_766.png\" alt=\"IMG_766\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"55\" height=\"23\" class=\"wp-image-18441\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_767.png\" alt=\"IMG_767\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"60\" class=\"wp-image-18442\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_768.png\" alt=\"IMG_768\"> m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18443\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_769.png\" alt=\"IMG_769\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"82\" height=\"33\" class=\"wp-image-18444\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_770.png\" alt=\"IMG_770\"> \u0110\u1ec3 <img loading=\"lazy\" decoding=\"async\" width=\"57\" height=\"23\" class=\"wp-image-18445\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_771.png\" alt=\"IMG_771\"> th\u00ec <img loading=\"lazy\" decoding=\"async\" width=\"55\" height=\"23\" class=\"wp-image-18446\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_772.png\" alt=\"IMG_772\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>9. D\u1ea1ng 9<\/strong>: B\u00e0i to\u00e1n th\u1ef1c t\u1ebf li\u00ean quan<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 1: <\/strong>M\u1ed9t l\u1edbp c\u00f3 30 <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a>, trong \u0111\u00f3 m\u1ed7i <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> gi\u1ecfi \u00edt nh\u1ea5t m\u1ed9t trong hai m\u00f4n H\u00f3a v\u00e0 V\u0103n, bi\u1ebft r\u1eb1ng c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"23\" class=\"wp-image-18447\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_773.png\" alt=\"IMG_773\"> b\u1ea1n h\u1ecdc gi\u1ecfi m\u00f4n H\u00f3a, <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"23\" class=\"wp-image-18448\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_774.png\" alt=\"IMG_774\"> b\u1ea1n h\u1ecdc gi\u1ecfi m\u00f4n V\u0103n. H\u1ecfi l\u1edbp \u0111\u00f3 c\u00f3 bao nhi\u00eau <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> gi\u1ecfi c\u1ea3 hai m\u00f4n<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18449\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_775.png\" alt=\"IMG_775\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18450\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_776.png\" alt=\"IMG_776\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"23\" class=\"wp-image-18451\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_777.png\" alt=\"IMG_777\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18452\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_778.png\" alt=\"IMG_778\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n A.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ed1 <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> h\u1ecdc gi\u1ecfi c\u1ea3 hai m\u00f4n : <img loading=\"lazy\" decoding=\"async\" width=\"127\" height=\"23\" class=\"wp-image-18453\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_779.png\" alt=\"IMG_779\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 2: <\/strong>Trong s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"23\" class=\"wp-image-18454\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_780.png\" alt=\"IMG_780\"> <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> c\u1ee7a l\u1edbp 10A c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"23\" class=\"wp-image-18455\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_781.png\" alt=\"IMG_781\"> b\u1ea1n \u0111\u01b0\u1ee3c x\u1ebfp lo\u1ea1i h\u1ecdc l\u1ef1c gi\u1ecfi, <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"23\" class=\"wp-image-18456\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_782.png\" alt=\"IMG_782\"> b\u1ea1n \u0111\u01b0\u1ee3c x\u1ebfp lo\u1ea1i h\u1ea1nh ki\u1ec3m t\u1ed1t, trong \u0111\u00f3 c\u00f3 10 b\u1ea1n v\u1eeba \u0111\u01b0\u1ee3c <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> gi\u1ecfi v\u1eeba \u0111\u01b0\u1ee3c h\u1ea1nh ki\u1ec3m t\u1ed1t. Khi \u0111\u00f3 l\u1edbp 10A c\u00f3 bao nhi\u00eau b\u1ea1n \u0111\u01b0\u1ee3c khen th\u01b0\u1edfng, bi\u1ebft r\u1eb1ng mu\u1ed1n \u0111\u01b0\u1ee3c khen th\u01b0\u1edfng b\u1ea1n \u0111\u00f3 ph\u1ea3i c\u00f3 h\u1ecdc l\u1ef1c gi\u1ecfi hay h\u1ea1nh ki\u1ec3m t\u1ed1t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18457\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_783.png\" alt=\"IMG_783\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18458\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_784.png\" alt=\"IMG_784\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18459\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_785.png\" alt=\"IMG_785\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"30\" height=\"23\" class=\"wp-image-18460\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_786.png\" alt=\"IMG_786\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n A.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ed1 <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> l\u1edbp 10A \u0111\u01b0\u1ee3c khen th\u01b0\u1edfng l\u00e0: <img loading=\"lazy\" decoding=\"async\" width=\"137\" height=\"23\" class=\"wp-image-18461\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_787.png\" alt=\"IMG_787\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 3: <\/strong>Trong s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"23\" class=\"wp-image-18462\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_788.png\" alt=\"IMG_788\"> h\u1ecdc sinh c\u1ee7a l\u1edbp 10A c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"23\" class=\"wp-image-18463\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_789.png\" alt=\"IMG_789\"> b\u1ea1n \u0111\u01b0\u1ee3c x\u1ebfp lo\u1ea1i h\u1ecdc l\u1ef1c gi\u1ecfi, <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"23\" class=\"wp-image-18464\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_790.png\" alt=\"IMG_790\"> b\u1ea1n \u0111\u01b0\u1ee3c x\u1ebfp lo\u1ea1i h\u1ea1nh ki\u1ec3m t\u1ed1t, trong \u0111\u00f3 c\u00f3 10 b\u1ea1n v\u1eeba \u0111\u01b0\u1ee3c h\u1ecdc sinh gi\u1ecfi v\u1eeba \u0111\u01b0\u1ee3c h\u1ea1nh ki\u1ec3m t\u1ed1t. Khi \u0111\u00f3 l\u1edbp 10A c\u00f3 bao nhi\u00eau b\u1ea1n ch\u01b0a \u0111\u01b0\u1ee3c x\u1ebfp lo\u1ea1i h\u1ecdc l\u1ef1c gi\u1ecfi v\u00e0 ch\u01b0a c\u00f3 h\u1ea1nh ki\u1ec3m t\u1ed1t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18465\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_791.png\" alt=\"IMG_791\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18466\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_792.png\" alt=\"IMG_792\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18467\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_793.png\" alt=\"IMG_793\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"30\" height=\"23\" class=\"wp-image-18468\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_794.png\" alt=\"IMG_794\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n A.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ed1 h\u1ecdc sinh l\u1edbp 10A ch\u01b0a \u0111\u01b0\u1ee3c x\u1ebfp lo\u1ea1i h\u1ecdc l\u1ef1c gi\u1ecfi v\u00e0 ch\u01b0a c\u00f3 h\u1ea1nh ki\u1ec3m t\u1ed1t l\u00e0: <img loading=\"lazy\" decoding=\"async\" width=\"188\" height=\"26\" class=\"wp-image-18469\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_795.png\" alt=\"IMG_795\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323 4: <\/strong>Trong k\u00ec thi h\u1ecdc sinh gi\u1ecfi c\u1ea5p tr\u01b0\u1eddng, l\u1edbp 10A c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"25\" height=\"23\" class=\"wp-image-18470\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_796.png\" alt=\"IMG_796\"> b\u1ea1n \u0111\u01b0\u1ee3c x\u1ebfp c\u00f4ng nh\u1eadn h\u1ecdc sinh gi\u1ecfi V\u0103n, <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"23\" class=\"wp-image-18471\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_797.png\" alt=\"IMG_797\"> b\u1ea1n h\u1ecdc sinh gi\u1ecfi To\u00e1n. T\u00ecm s\u1ed1 h\u1ecdc sinh gi\u1ecfi c\u1ea3 V\u0103n v\u00e0 To\u00e1n bi\u1ebft l\u1edbp 10A c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"23\" class=\"wp-image-18472\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_798.png\" alt=\"IMG_798\"> h\u1ecdc sinh v\u00e0 c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"23\" class=\"wp-image-18473\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_799.png\" alt=\"IMG_799\"> h\u1ecdc sinh kh\u00f4ng \u0111\u1ea1t h\u1ecdc sinh gi\u1ecfi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"23\" class=\"wp-image-18474\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_800.png\" alt=\"IMG_800\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18475\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_801.png\" alt=\"IMG_801\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18476\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_802.png\" alt=\"IMG_802\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"23\" class=\"wp-image-18477\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_803.png\" alt=\"IMG_803\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n A.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ed1 b\u1ea1n \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn l\u00e0 h\u1ecdc sinh gi\u1ecfi l\u00e0: <img loading=\"lazy\" decoding=\"async\" width=\"100\" height=\"23\" class=\"wp-image-18478\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_804.png\" alt=\"IMG_804\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ed1 h\u1ecdc sinh gi\u1ecfi c\u1ea3 V\u0103n v\u00e0 To\u00e1n l\u00e0: <img loading=\"lazy\" decoding=\"async\" width=\"137\" height=\"23\" class=\"wp-image-18479\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_805.png\" alt=\"IMG_805\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vi\u0301 du\u0323: <\/strong>Cho t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"340\" height=\"43\" class=\"wp-image-18480\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_806.png\" alt=\"IMG_806\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_806.png 340w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_806-300x38.png 300w\" sizes=\"(max-width: 340px) 100vw, 340px\" \/> . T\u00ecm <img loading=\"lazy\" decoding=\"async\" width=\"22\" height=\"19\" class=\"wp-image-18481\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_807.png\" alt=\"IMG_807\"> \u0111\u1ec3 <img loading=\"lazy\" decoding=\"async\" width=\"57\" height=\"23\" class=\"wp-image-18482\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_808.png\" alt=\"IMG_808\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"54\" height=\"23\" class=\"wp-image-18483\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_809.png\" alt=\"IMG_809\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"55\" height=\"23\" class=\"wp-image-18484\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_810.png\" alt=\"IMG_810\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"55\" height=\"23\" class=\"wp-image-18485\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_811.png\" alt=\"IMG_811\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"55\" height=\"23\" class=\"wp-image-18486\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_812.png\" alt=\"IMG_812\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n B.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gia\u0309i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"60\" class=\"wp-image-18487\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_813.png\" alt=\"IMG_813\"> m\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"23\" class=\"wp-image-18488\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_814.png\" alt=\"IMG_814\"> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"82\" height=\"33\" class=\"wp-image-18489\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_815.png\" alt=\"IMG_815\"> \u0110\u1ec3 <img loading=\"lazy\" decoding=\"async\" width=\"57\" height=\"23\" class=\"wp-image-18490\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_816.png\" alt=\"IMG_816\"> th\u00ec <img loading=\"lazy\" decoding=\"async\" width=\"55\" height=\"23\" class=\"wp-image-18491\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_817.png\" alt=\"IMG_817\"><\/p>\n\n\n\n<br>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B. B\u00c0I T\u1eacP T\u1ef0 LUY\u1ec6N <\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 29: <\/strong>M\u1ed9t l\u1edbp c\u00f3 40 h\u1ecdc sinh, trong \u0111\u00f3 m\u1ed7i h\u1ecdc sinh gi\u1ecfi \u00edt nh\u1ea5t m\u1ed9t trong hai m\u00f4n H\u00f3a v\u00e0 V\u0103n, bi\u1ebft r\u1eb1ng c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"23\" class=\"wp-image-18492\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_818.png\" alt=\"IMG_818\"> b\u1ea1n h\u1ecdc gi\u1ecfi m\u00f4n H\u00f3a, <img loading=\"lazy\" decoding=\"async\" width=\"25\" height=\"23\" class=\"wp-image-18493\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_819.png\" alt=\"IMG_819\"> b\u1ea1n h\u1ecdc gi\u1ecfi m\u00f4n V\u0103n. H\u1ecfi l\u1edbp \u0111\u00f3 c\u00f3 bao nhi\u00eau h\u1ecdc sinh gi\u1ecfi c\u1ea3 hai m\u00f4n<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18494\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_820.png\" alt=\"IMG_820\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18495\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_821.png\" alt=\"IMG_821\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"23\" class=\"wp-image-18496\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_822.png\" alt=\"IMG_822\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18497\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_823.png\" alt=\"IMG_823\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 30: <\/strong>Trong s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"25\" height=\"23\" class=\"wp-image-18498\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_824.png\" alt=\"IMG_824\"> h\u1ecdc sinh c\u1ee7a l\u1edbp 10A c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"23\" class=\"wp-image-18499\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_825.png\" alt=\"IMG_825\"> b\u1ea1n \u0111\u01b0\u1ee3c x\u1ebfp lo\u1ea1i h\u1ecdc l\u1ef1c gi\u1ecfi, <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"23\" class=\"wp-image-18500\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_826.png\" alt=\"IMG_826\"> b\u1ea1n \u0111\u01b0\u1ee3c x\u1ebfp lo\u1ea1i h\u1ea1nh ki\u1ec3m t\u1ed1t, trong \u0111\u00f3 c\u00f3 10 b\u1ea1n v\u1eeba \u0111\u01b0\u1ee3c h\u1ecdc sinh gi\u1ecfi v\u1eeba \u0111\u01b0\u1ee3c h\u1ea1nh ki\u1ec3m t\u1ed1t. Khi \u0111\u00f3 l\u1edbp 10A c\u00f3 bao nhi\u00eau b\u1ea1n \u0111\u01b0\u1ee3c khen th\u01b0\u1edfng, bi\u1ebft r\u1eb1ng mu\u1ed1n \u0111\u01b0\u1ee3c khen th\u01b0\u1edfng b\u1ea1n \u0111\u00f3 ph\u1ea3i c\u00f3 h\u1ecdc l\u1ef1c gi\u1ecfi hay h\u1ea1nh ki\u1ec3m t\u1ed1t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18501\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_827.png\" alt=\"IMG_827\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18502\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_828.png\" alt=\"IMG_828\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18503\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_829.png\" alt=\"IMG_829\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"30\" height=\"23\" class=\"wp-image-18504\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_830.png\" alt=\"IMG_830\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 31: <\/strong>Trong s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"23\" class=\"wp-image-18505\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_831.png\" alt=\"IMG_831\"> h\u1ecdc sinh c\u1ee7a l\u1edbp 10A c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"23\" class=\"wp-image-18506\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_832.png\" alt=\"IMG_832\"> b\u1ea1n \u0111\u01b0\u1ee3c x\u1ebfp lo\u1ea1i h\u1ecdc l\u1ef1c gi\u1ecfi, <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"23\" class=\"wp-image-18507\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_833.png\" alt=\"IMG_833\"> b\u1ea1n \u0111\u01b0\u1ee3c x\u1ebfp lo\u1ea1i h\u1ea1nh ki\u1ec3m t\u1ed1t, trong \u0111\u00f3 c\u00f3 10 b\u1ea1n v\u1eeba \u0111\u01b0\u1ee3c h\u1ecdc sinh gi\u1ecfi v\u1eeba \u0111\u01b0\u1ee3c h\u1ea1nh ki\u1ec3m t\u1ed1t. Khi \u0111\u00f3 l\u1edbp 10A c\u00f3 bao nhi\u00eau b\u1ea1n ch\u01b0a \u0111\u01b0\u1ee3c x\u1ebfp lo\u1ea1i h\u1ecdc l\u1ef1c gi\u1ecfi v\u00e0 ch\u01b0a c\u00f3 h\u1ea1nh ki\u1ec3m t\u1ed1t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18508\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_834.png\" alt=\"IMG_834\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"23\" class=\"wp-image-18509\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_835.png\" alt=\"IMG_835\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18510\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_836.png\" alt=\"IMG_836\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"30\" height=\"23\" class=\"wp-image-18511\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_837.png\" alt=\"IMG_837\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 32: <\/strong>Trong k\u00ec thi h\u1ecdc sinh gi\u1ecfi c\u1ea5p tr\u01b0\u1eddng, l\u1edbp 10A c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"25\" height=\"23\" class=\"wp-image-18512\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_838.png\" alt=\"IMG_838\"> b\u1ea1n \u0111\u01b0\u1ee3c x\u1ebfp c\u00f4ng nh\u1eadn h\u1ecdc sinh gi\u1ecfi V\u0103n, <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"23\" class=\"wp-image-18513\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_839.png\" alt=\"IMG_839\"> b\u1ea1n h\u1ecdc sinh gi\u1ecfi To\u00e1n. T\u00ecm s\u1ed1 h\u1ecdc sinh gi\u1ecfi c\u1ea3 V\u0103n v\u00e0 To\u00e1n bi\u1ebft l\u1edbp 10A c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"23\" class=\"wp-image-18514\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_840.png\" alt=\"IMG_840\"> h\u1ecdc sinh v\u00e0 c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"23\" class=\"wp-image-18515\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_841.png\" alt=\"IMG_841\"> h\u1ecdc sinh kh\u00f4ng \u0111\u1ea1t h\u1ecdc sinh gi\u1ecfi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18516\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_842.png\" alt=\"IMG_842\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18517\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_843.png\" alt=\"IMG_843\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"23\" class=\"wp-image-18518\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_844.png\" alt=\"IMG_844\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"23\" class=\"wp-image-18519\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_845.png\" alt=\"IMG_845\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01a1\u0300i gia\u0309i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cho\u0323n A.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ed1 b\u1ea1n \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn l\u00e0 h\u1ecdc sinh gi\u1ecfi l\u00e0: <img loading=\"lazy\" decoding=\"async\" width=\"100\" height=\"23\" class=\"wp-image-18520\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_846.png\" alt=\"IMG_846\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ed1 h\u1ecdc sinh gi\u1ecfi c\u1ea3 V\u0103n v\u00e0 To\u00e1n l\u00e0: <img loading=\"lazy\" decoding=\"async\" width=\"130\" height=\"23\" class=\"wp-image-18521\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_847.png\" alt=\"IMG_847\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. \u0110\u00c1P \u00c1N PH\u1ea6N B\u00c0I T\u1eacP T\u1ef0 LUY\u1ec6N<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 29. D<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 30. D<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 31. B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 32. A<\/strong><\/p>\n\n\n\n<br>\n\n\n\n<br>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>III \u2013 \u0110\u00ca\u0300 KI\u00ca\u0309M TRA CU\u00d4\u0301I BA\u0300I<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 1:<\/strong> T\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"310\" height=\"45\" class=\"wp-image-18522\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_848.png\" alt=\"IMG_848\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_848.png 310w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_848-300x44.png 300w\" sizes=\"(max-width: 310px) 100vw, 310px\" \/> Li\u1ec7t k\u00ea c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a t\u1eadp h\u1ee3p B?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"58\" height=\"23\" class=\"wp-image-18523\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_849.png\" alt=\"IMG_849\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"83\" height=\"34\" class=\"wp-image-18524\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_850.png\" alt=\"IMG_850\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"98\" height=\"34\" class=\"wp-image-18525\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_851.png\" alt=\"IMG_851\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"86\" height=\"34\" class=\"wp-image-18526\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_852.png\" alt=\"IMG_852\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 2:<\/strong> Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"314\" height=\"39\" class=\"wp-image-18527\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_853.png\" alt=\"IMG_853\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_853.png 314w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_853-300x37.png 300w\" sizes=\"(max-width: 314px) 100vw, 314px\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"191\" height=\"39\" class=\"wp-image-18528\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_854.png\" alt=\"IMG_854\"> . Ch\u1ecdn m\u1ec7nh \u0111\u1ec1 \u0111\u00fang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"106\" height=\"34\" class=\"wp-image-18529\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_855.png\" alt=\"IMG_855\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"123\" height=\"34\" class=\"wp-image-18530\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_856.png\" alt=\"IMG_856\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"106\" height=\"34\" class=\"wp-image-18531\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_857.png\" alt=\"IMG_857\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"120\" height=\"34\" class=\"wp-image-18532\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_858.png\" alt=\"IMG_858\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 3:<\/strong> Trong c\u00e1c t\u1eadp h\u1ee3p sau, t\u1eadp h\u1ee3p n\u00e0o r\u1ed7ng?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"118\" height=\"39\" class=\"wp-image-18533\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_859.png\" alt=\"IMG_859\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"191\" height=\"39\" class=\"wp-image-18534\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_860.png\" alt=\"IMG_860\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"195\" height=\"39\" class=\"wp-image-18535\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_861.png\" alt=\"IMG_861\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"191\" height=\"39\" class=\"wp-image-18536\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_862.png\" alt=\"IMG_862\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 4:<\/strong> T\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"115\" height=\"34\" class=\"wp-image-18537\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_863.png\" alt=\"IMG_863\"> c\u00f3 t\u1ea5t c\u1ea3 bao nhi\u00eau t\u1eadp con.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"23\" class=\"wp-image-18538\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_864.png\" alt=\"IMG_864\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"24\" class=\"wp-image-18539\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_865.png\" alt=\"IMG_865\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"23\" class=\"wp-image-18540\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_866.png\" alt=\"IMG_866\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"24\" class=\"wp-image-18541\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_867.png\" alt=\"IMG_867\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 5: <\/strong>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"419\" height=\"40\" class=\"wp-image-18542\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_868.png\" alt=\"IMG_868\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_868.png 419w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_868-300x29.png 300w\" sizes=\"(max-width: 419px) 100vw, 419px\" \/> khi \u0111\u00f3:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"163\" height=\"57\" class=\"wp-image-18543\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_869.png\" alt=\"IMG_869\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"102\" height=\"33\" class=\"wp-image-18544\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_870.png\" alt=\"IMG_870\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"137\" height=\"33\" class=\"wp-image-18545\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_871.png\" alt=\"IMG_871\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"196\" height=\"56\" class=\"wp-image-18546\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_872.png\" alt=\"IMG_872\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 6: <\/strong>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"321\" height=\"33\" class=\"wp-image-18547\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_873.png\" alt=\"IMG_873\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_873.png 321w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_873-300x31.png 300w\" sizes=\"(max-width: 321px) 100vw, 321px\" \/> khi \u0111\u00f3 t\u1eadp <img loading=\"lazy\" decoding=\"async\" width=\"42\" height=\"30\" class=\"wp-image-18548\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_874.png\" alt=\"IMG_874\"> l\u00e0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"85\" height=\"33\" class=\"wp-image-18549\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_875.png\" alt=\"IMG_875\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"46\" height=\"33\" class=\"wp-image-18550\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_876.png\" alt=\"IMG_876\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"33\" class=\"wp-image-18551\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_877.png\" alt=\"IMG_877\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"86\" height=\"33\" class=\"wp-image-18552\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_878.png\" alt=\"IMG_878\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 7:<\/strong> T\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"130\" height=\"34\" class=\"wp-image-18553\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_879.png\" alt=\"IMG_879\"> c\u00f3 bao nhi\u00eau t\u1eadp con, m\u00e0 kh\u00f4ng c\u00f3 ba ph\u1ea7n t\u1eed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"23\" class=\"wp-image-18554\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_880.png\" alt=\"IMG_880\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"32\" height=\"23\" class=\"wp-image-18555\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_881.png\" alt=\"IMG_881\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"24\" class=\"wp-image-18556\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_882.png\" alt=\"IMG_882\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"24\" class=\"wp-image-18557\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_883.png\" alt=\"IMG_883\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 8:<\/strong> Cho <img loading=\"lazy\" decoding=\"async\" width=\"135\" height=\"24\" class=\"wp-image-18558\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_884.png\" alt=\"IMG_884\"> M\u1ec7nh \u0111\u1ec1 n\u00e0o d\u01b0\u1edbi \u0111\u00e2y l\u00e0 <strong>sai<\/strong>?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"191\" height=\"34\" class=\"wp-image-18559\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_885.png\" alt=\"IMG_885\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"134\" height=\"34\" class=\"wp-image-18560\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_886.png\" alt=\"IMG_886\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"139\" height=\"34\" class=\"wp-image-18561\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_887.png\" alt=\"IMG_887\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"142\" height=\"34\" class=\"wp-image-18562\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_888.png\" alt=\"IMG_888\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 9.<\/strong> Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"32\" class=\"wp-image-18563\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_889.png\" alt=\"IMG_889\"> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"105\" height=\"33\" class=\"wp-image-18564\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_890.png\" alt=\"IMG_890\"> T\u00ecm <img loading=\"lazy\" decoding=\"async\" width=\"55\" height=\"24\" class=\"wp-image-18565\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_891.png\" alt=\"IMG_891\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"107\" height=\"33\" class=\"wp-image-18566\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_892.png\" alt=\"IMG_892\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"117\" height=\"32\" class=\"wp-image-18567\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_893.png\" alt=\"IMG_893\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"140\" height=\"33\" class=\"wp-image-18568\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_894.png\" alt=\"IMG_894\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"123\" height=\"33\" class=\"wp-image-18569\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_895.png\" alt=\"IMG_895\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 10.<\/strong> Cho c\u00e1c t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"110\" height=\"32\" class=\"wp-image-18570\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_896.png\" alt=\"IMG_896\"> , <img loading=\"lazy\" decoding=\"async\" width=\"111\" height=\"32\" class=\"wp-image-18571\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_897.png\" alt=\"IMG_897\"> , <img loading=\"lazy\" decoding=\"async\" width=\"103\" height=\"31\" class=\"wp-image-18572\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_898.png\" alt=\"IMG_898\"> . Kh\u1eb3ng \u0111\u1ecbnh n\u00e0o sau \u0111\u00e2y \u0111\u00fang?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"31\" class=\"wp-image-18573\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_899.png\" alt=\"IMG_899\"> <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"243\" height=\"31\" class=\"wp-image-18574\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_900.png\" alt=\"IMG_900\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"240\" height=\"31\" class=\"wp-image-18575\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_901.png\" alt=\"IMG_901\"> <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"206\" height=\"32\" class=\"wp-image-18576\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_902.png\" alt=\"IMG_902\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 11.<\/strong> Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"270\" height=\"32\" class=\"wp-image-18577\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_903.png\" alt=\"IMG_903\"> . X\u00e1c \u0111inh t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"51\" height=\"23\" class=\"wp-image-18578\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_904.png\" alt=\"IMG_904\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"101\" height=\"32\" class=\"wp-image-18579\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_905.png\" alt=\"IMG_905\"> <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"118\" height=\"33\" class=\"wp-image-18580\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_906.png\" alt=\"IMG_906\"> <strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"113\" height=\"32\" class=\"wp-image-18581\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_907.png\" alt=\"IMG_907\"> <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"116\" height=\"32\" class=\"wp-image-18582\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_908.png\" alt=\"IMG_908\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 12.<\/strong> Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"255\" height=\"31\" class=\"wp-image-18583\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_909.png\" alt=\"IMG_909\"> . T\u00ecm <img loading=\"lazy\" decoding=\"async\" width=\"178\" height=\"32\" class=\"wp-image-18584\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_910.png\" alt=\"IMG_910\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"120\" height=\"32\" class=\"wp-image-18585\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_911.png\" alt=\"IMG_911\"> <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"89\" height=\"31\" class=\"wp-image-18586\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_912.png\" alt=\"IMG_912\"> <strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"75\" height=\"31\" class=\"wp-image-18587\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_913.png\" alt=\"IMG_913\"> <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"65\" height=\"25\" class=\"wp-image-18588\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_914.png\" alt=\"IMG_914\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 13. <\/strong>Cho hai t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"255\" height=\"32\" class=\"wp-image-18589\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_915.png\" alt=\"IMG_915\"> . Kh\u1eb3ng \u0111\u1ecbnh n\u00e0o sau \u0111\u00e2y \u0111\u00fang?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"117\" height=\"32\" class=\"wp-image-18590\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_916.png\" alt=\"IMG_916\"> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"132\" height=\"31\" class=\"wp-image-18591\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_917.png\" alt=\"IMG_917\"> <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"113\" height=\"31\" class=\"wp-image-18592\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_918.png\" alt=\"IMG_918\"> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"114\" height=\"32\" class=\"wp-image-18593\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_919.png\" alt=\"IMG_919\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"111\" height=\"32\" class=\"wp-image-18594\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_920.png\" alt=\"IMG_920\"> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"120\" height=\"33\" class=\"wp-image-18595\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_921.png\" alt=\"IMG_921\"> <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"115\" height=\"33\" class=\"wp-image-18596\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_922.png\" alt=\"IMG_922\"> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"166\" height=\"32\" class=\"wp-image-18597\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_923.png\" alt=\"IMG_923\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 14. <\/strong>Cho <img loading=\"lazy\" decoding=\"async\" width=\"25\" height=\"25\" class=\"wp-image-18598\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_924.png\" alt=\"IMG_924\"> l\u00e0 t\u1eadp h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"122\" height=\"26\" class=\"wp-image-18599\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_925.png\" alt=\"IMG_925\"> ; <img loading=\"lazy\" decoding=\"async\" width=\"25\" height=\"25\" class=\"wp-image-18600\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_926.png\" alt=\"IMG_926\"> l\u00e0 t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 4. Kh\u1eb3ng \u0111\u1ecbnh n\u00e0o sau \u0111\u00e2y \u0111\u00fang?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"94\" height=\"24\" class=\"wp-image-18601\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_927.png\" alt=\"IMG_927\"> <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"127\" height=\"24\" class=\"wp-image-18602\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_928.png\" alt=\"IMG_928\"> <strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"93\" height=\"24\" class=\"wp-image-18603\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_929.png\" alt=\"IMG_929\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"93\" height=\"24\" class=\"wp-image-18604\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_930.png\" alt=\"IMG_930\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img loading=\"lazy\" decoding=\"async\" width=\"171\" height=\"103\" class=\"wp-image-18605\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_931.jpeg\" alt=\"IMG_931\"><strong>C\u00e2u 15.<\/strong> Cho <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"26\" class=\"wp-image-18606\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_932.png\" alt=\"IMG_932\"> l\u00e0 hai t\u1eadp h\u1ee3p \u0111\u01b0\u1ee3c minh h\u1ecda nh\u01b0 h\u00ecnh v\u1ebd. Ph\u1ea7n t\u00f4 \u0111en trong h\u00ecnh v\u1ebd l\u00e0 t\u1eadp h\u1ee3p n\u00e0o sau \u0111\u00e2y ?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong> A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"57\" height=\"23\" class=\"wp-image-18607\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_933.png\" alt=\"IMG_933\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong> B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"22\" class=\"wp-image-18608\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_934.png\" alt=\"IMG_934\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_934.png 53w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_934-50x22.png 50w\" sizes=\"(max-width: 53px) 100vw, 53px\" \/><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong> C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"22\" class=\"wp-image-18609\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_935.png\" alt=\"IMG_935\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong> D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"48\" height=\"22\" class=\"wp-image-18610\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_936.png\" alt=\"IMG_936\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img loading=\"lazy\" decoding=\"async\" width=\"158\" height=\"129\" class=\"wp-image-18611\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_937.jpeg\" alt=\"IMG_937\"><strong>C\u00e2u 16.<\/strong> Cho <img loading=\"lazy\" decoding=\"async\" width=\"71\" height=\"24\" class=\"wp-image-18612\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_938.png\" alt=\"IMG_938\"> l\u00e0 ba t\u1eadp h\u1ee3p \u0111\u01b0\u1ee3c minh h\u1ecda nh\u01b0 h\u00ecnh v\u1ebd b\u00ean. Ph\u1ea7n g\u1ea1ch s\u1ecdc trong h\u00ecnh v\u1ebd l\u00e0 t\u1eadp h\u1ee3p n\u00e0o sau \u0111\u00e2y?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong> A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"91\" height=\"31\" class=\"wp-image-18613\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_939.png\" alt=\"IMG_939\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong> B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"92\" height=\"31\" class=\"wp-image-18614\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_940.png\" alt=\"IMG_940\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong> C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"135\" height=\"31\" class=\"wp-image-18615\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_941.png\" alt=\"IMG_941\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"90\" height=\"24\" class=\"wp-image-18616\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_942.png\" alt=\"IMG_942\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 17.<\/strong> Cho hai \u0111a th\u1ee9c <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"33\" class=\"wp-image-18617\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_943.png\" alt=\"IMG_943\"> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"37\" class=\"wp-image-18618\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_944.png\" alt=\"IMG_944\"> . X\u00e9t c\u00e1c t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"179\" height=\"34\" class=\"wp-image-18619\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_945.png\" alt=\"IMG_945\"> , <img loading=\"lazy\" decoding=\"async\" width=\"176\" height=\"34\" class=\"wp-image-18620\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_946.png\" alt=\"IMG_946\"> , <img loading=\"lazy\" decoding=\"async\" width=\"173\" height=\"62\" class=\"wp-image-18621\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_947.png\" alt=\"IMG_947\"> . M\u1ec7nh \u0111\u1ec1 n\u00e0o sau \u0111\u00e2y \u0111\u00fang?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"90\" height=\"23\" class=\"wp-image-18622\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_948.png\" alt=\"IMG_948\"> <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"94\" height=\"24\" class=\"wp-image-18623\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_949.png\" alt=\"IMG_949\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"89\" height=\"23\" class=\"wp-image-18624\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_950.png\" alt=\"IMG_950\"> <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"93\" height=\"24\" class=\"wp-image-18625\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_951.png\" alt=\"IMG_951\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 18.<\/strong> Cho hai \u0111a th\u1ee9c <img loading=\"lazy\" decoding=\"async\" width=\"48\" height=\"32\" class=\"wp-image-18626\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_952.png\" alt=\"IMG_952\"> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"43\" height=\"32\" class=\"wp-image-18627\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_953.png\" alt=\"IMG_953\"> . X\u00e9t c\u00e1c t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"180\" height=\"34\" class=\"wp-image-18628\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_954.png\" alt=\"IMG_954\"> , <img loading=\"lazy\" decoding=\"async\" width=\"177\" height=\"34\" class=\"wp-image-18629\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_955.png\" alt=\"IMG_955\"> , <img loading=\"lazy\" decoding=\"async\" width=\"238\" height=\"33\" class=\"wp-image-18630\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_956.png\" alt=\"IMG_956\"> . M\u1ec7nh \u0111\u1ec1 n\u00e0o sau \u0111\u00e2y \u0111\u00fang?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"90\" height=\"23\" class=\"wp-image-18631\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_957.png\" alt=\"IMG_957\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"89\" height=\"23\" class=\"wp-image-18632\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_958.png\" alt=\"IMG_958\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"22\" class=\"wp-image-18633\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_959.png\" alt=\"IMG_959\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"88\" height=\"23\" class=\"wp-image-18634\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_960.png\" alt=\"IMG_960\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 19. <\/strong>Cho t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"58\" height=\"23\" class=\"wp-image-18635\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_961.png\" alt=\"IMG_961\"> . M\u1ec7nh \u0111\u1ec1 n\u00e0o sau \u0111\u00e2y \u0111\u00fang?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"90\" height=\"24\" class=\"wp-image-18636\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_962.png\" alt=\"IMG_962\"> <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"89\" height=\"23\" class=\"wp-image-18637\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_963.png\" alt=\"IMG_963\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"89\" height=\"23\" class=\"wp-image-18638\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_964.png\" alt=\"IMG_964\"> <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"88\" height=\"23\" class=\"wp-image-18639\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_965.png\" alt=\"IMG_965\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 20.<\/strong> Cho <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"22\" class=\"wp-image-18640\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_966.png\" alt=\"IMG_966\"> l\u00e0 hai t\u1eadp h\u1ee3p kh\u00e1c r\u1ed7ng. M\u1ec7nh \u0111\u1ec1 n\u00e0o sau \u0111\u00e2y \u0111\u00fang?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"91\" height=\"21\" class=\"wp-image-18641\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_967.png\" alt=\"IMG_967\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"94\" height=\"21\" class=\"wp-image-18642\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_968.png\" alt=\"IMG_968\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"130\" height=\"29\" class=\"wp-image-18643\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_969.png\" alt=\"IMG_969\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"125\" height=\"21\" class=\"wp-image-18644\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_970.png\" alt=\"IMG_970\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 21. <\/strong>Trong c\u00e1c t\u1eadp h\u1ee3p sau, t\u1eadp n\u00e0o c\u00f3 \u0111\u00fang hai t\u1eadp h\u1ee3p con ?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"58\" height=\"32\" class=\"wp-image-18645\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_971.png\" alt=\"IMG_971\"> <strong>B.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"36\" height=\"30\" class=\"wp-image-18646\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_972.png\" alt=\"IMG_972\"> <strong>C.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"63\" height=\"33\" class=\"wp-image-18647\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_973.png\" alt=\"IMG_973\"> <strong>D.<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"81\" height=\"33\" class=\"wp-image-18648\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_974.png\" alt=\"IMG_974\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 22. <\/strong>T\u00ecm <img loading=\"lazy\" decoding=\"async\" width=\"36\" height=\"21\" class=\"wp-image-18649\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_975.png\" alt=\"IMG_975\"> \u0111\u1ec3 ba t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"169\" height=\"31\" class=\"wp-image-18650\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_976.png\" alt=\"IMG_976\"> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"99\" height=\"31\" class=\"wp-image-18651\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_977.png\" alt=\"IMG_977\"> b\u1eb1ng nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"89\" height=\"29\" class=\"wp-image-18652\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_978.png\" alt=\"IMG_978\"><strong> B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"89\" height=\"30\" class=\"wp-image-18653\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_979.png\" alt=\"IMG_979\"> ho\u1eb7c <img loading=\"lazy\" decoding=\"async\" width=\"108\" height=\"30\" class=\"wp-image-18654\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_980.png\" alt=\"IMG_980\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"107\" height=\"30\" class=\"wp-image-18655\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_981.png\" alt=\"IMG_981\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"93\" height=\"26\" class=\"wp-image-18656\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_982.png\" alt=\"IMG_982\"> ho\u1eb7c <img loading=\"lazy\" decoding=\"async\" width=\"90\" height=\"28\" class=\"wp-image-18657\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_983.png\" alt=\"IMG_983\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 23. <\/strong>Cho t\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"101\" height=\"33\" class=\"wp-image-18658\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_984.png\" alt=\"IMG_984\"> T\u1eadp h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-18659\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_985.png\" alt=\"IMG_985\"> c\u00f3 t\u1ea5t c\u1ea3 bao nhi\u00eau t\u1eadp con c\u00f3 \u0111\u00fang <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"22\" class=\"wp-image-18660\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_986.png\" alt=\"IMG_986\"> ph\u1ea7n t\u1eed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18661\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_987.png\" alt=\"IMG_987\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"23\" class=\"wp-image-18662\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_988.png\" alt=\"IMG_988\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"23\" class=\"wp-image-18663\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_989.png\" alt=\"IMG_989\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"23\" class=\"wp-image-18664\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_990.png\" alt=\"IMG_990\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 24: <\/strong>M\u1ed9t l\u1edbp c\u00f3 40 h\u1ecdc sinh, trong \u0111\u00f3 m\u1ed7i h\u1ecdc sinh gi\u1ecfi \u00edt nh\u1ea5t m\u1ed9t trong hai m\u00f4n H\u00f3a v\u00e0 V\u0103n, bi\u1ebft r\u1eb1ng c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"23\" class=\"wp-image-18665\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_991.png\" alt=\"IMG_991\"> b\u1ea1n h\u1ecdc gi\u1ecfi m\u00f4n H\u00f3a, <img loading=\"lazy\" decoding=\"async\" width=\"25\" height=\"23\" class=\"wp-image-18666\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_992.png\" alt=\"IMG_992\"> b\u1ea1n h\u1ecdc gi\u1ecfi m\u00f4n V\u0103n. H\u1ecfi l\u1edbp \u0111\u00f3 c\u00f3 bao nhi\u00eau h\u1ecdc sinh gi\u1ecfi c\u1ea3 hai m\u00f4n<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18667\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_993.png\" alt=\"IMG_993\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18668\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_994.png\" alt=\"IMG_994\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"23\" class=\"wp-image-18669\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_995.png\" alt=\"IMG_995\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"30\" height=\"23\" class=\"wp-image-18670\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_996.png\" alt=\"IMG_996\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 25: <\/strong>Trong s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"25\" height=\"23\" class=\"wp-image-18671\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_997.png\" alt=\"IMG_997\"> h\u1ecdc sinh c\u1ee7a l\u1edbp 10A c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"23\" class=\"wp-image-18672\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_998.png\" alt=\"IMG_998\"> b\u1ea1n \u0111\u01b0\u1ee3c x\u1ebfp lo\u1ea1i h\u1ecdc l\u1ef1c gi\u1ecfi, <img loading=\"lazy\" decoding=\"async\" width=\"28\" height=\"23\" class=\"wp-image-18673\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_999.png\" alt=\"IMG_999\"> b\u1ea1n \u0111\u01b0\u1ee3c x\u1ebfp lo\u1ea1i h\u1ea1nh ki\u1ec3m t\u1ed1t, trong \u0111\u00f3 c\u00f3 10 b\u1ea1n v\u1eeba \u0111\u01b0\u1ee3c h\u1ecdc sinh gi\u1ecfi v\u1eeba \u0111\u01b0\u1ee3c h\u1ea1nh ki\u1ec3m t\u1ed1t. Khi \u0111\u00f3 l\u1edbp 10A c\u00f3 bao nhi\u00eau b\u1ea1n \u0111\u01b0\u1ee3c khen th\u01b0\u1edfng, bi\u1ebft r\u1eb1ng mu\u1ed1n \u0111\u01b0\u1ee3c khen th\u01b0\u1edfng b\u1ea1n \u0111\u00f3 ph\u1ea3i c\u00f3 h\u1ecdc l\u1ef1c gi\u1ecfi hay h\u1ea1nh ki\u1ec3m t\u1ed1t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18674\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_1000.png\" alt=\"IMG_1000\"> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18675\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_1001.png\" alt=\"IMG_1001\"> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"23\" class=\"wp-image-18676\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_1002.png\" alt=\"IMG_1002\"> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"30\" height=\"23\" class=\"wp-image-18677\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_1003.png\" alt=\"IMG_1003\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110\u00c1P \u00c1N<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 1.D<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 2.C<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 3.B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 4.A<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 5.D<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 6.B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 7.A<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 8.D<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 9.D<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 10.C<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 11.B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 12.D<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 13.B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 14.C<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 15.A<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 16.B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 17.C<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 18.B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 19.D<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 20.B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 21.B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 22.B<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 23.C<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 24.D<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2u 25.D<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I \u2013 LY\u0301 THUY\u00ca\u0301T I \u2013 GIAO C\u1ee6A HAI T\u1eacP H\u1ee2P T\u1eadp h\u1ee3p g\u1ed3m c\u00e1c ph\u1ea7n t\u1eed v\u1eeba thu\u1ed9c v\u1eeba thu\u1ed9c \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 giao c\u1ee7a v\u00e0 K\u00ed hi\u1ec7u (ph\u1ea7n g\u1ea1ch ch\u00e9o trong h\u00ecnh). V\u1eady II \u2013 H\u1ee2P C\u1ee6A HAI T\u1eacP H\u1ee2P T\u1eadp h\u1ee3p g\u1ed3m c\u00e1c ph\u1ea7n t\u1eed thu\u1ed9c ho\u1eb7c thu\u1ed9c \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 h\u1ee3p [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[41],"tags":[],"class_list":["post-17929","post","type-post","status-publish","format-standard","hentry","category-toan-lop-10"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/17929","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=17929"}],"version-history":[{"count":4,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/17929\/revisions"}],"predecessor-version":[{"id":20583,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/17929\/revisions\/20583"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=17929"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=17929"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=17929"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}