{"id":24993,"date":"2021-12-17T17:27:14","date_gmt":"2021-12-17T10:27:14","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=24993"},"modified":"2021-12-17T17:27:16","modified_gmt":"2021-12-17T10:27:16","slug":"phuong-trinh-mat-cau-nang-cao","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/phuong-trinh-mat-cau-nang-cao\/","title":{"rendered":"PH\u01af\u01a0NG TR\u00ccNH M\u1eb6T C\u1ea6U N\u00c2NG CAO"},"content":{"rendered":"<h2><a id=\"post-24993-_Toc493273876\"><\/a><a id=\"post-24993-_Toc492701526\"><\/a><strong>A &#8211; L\u00dd THUY\u1ebeT CHUNG<\/strong><\/h2>\n<p><strong>1. \u0110\u1ecbnh ngh\u0129a m\u1eb7t c\u1ea7u<\/strong><\/p>\n<p>T\u1eadp h\u1ee3p c\u00e1c \u0111i\u1ec3m trong kh\u00f4ng gian c\u00e1ch \u0111i\u1ec3m <img decoding=\"async\" width=\"20\" height=\"24\" class=\"wp-image-24994\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_256-46.png\" alt=\"IMG_256\" \/> c\u1ed1 \u0111\u1ecbnh m\u1ed9t kho\u1ea3ng c\u00e1ch <img decoding=\"async\" width=\"20\" height=\"22\" class=\"wp-image-24995\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_257-45.png\" alt=\"IMG_257\" \/> cho tr\u01b0\u1edbc l\u00e0 m\u1eb7t c\u1ea7u t\u00e2m <img decoding=\"async\" width=\"20\" height=\"24\" class=\"wp-image-24996\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_258-46.png\" alt=\"IMG_258\" \/> v\u00e0 b\u00e1n k\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"24\" class=\"wp-image-24997\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_259-43.png\" alt=\"IMG_259\" \/> K\u00ed hi\u1ec7u <img loading=\"lazy\" decoding=\"async\" width=\"76\" height=\"34\" class=\"wp-image-24998\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_260-45.png\" alt=\"IMG_260\" \/><\/p>\n<p>Trong kh\u00f4ng gian v\u1edbi h\u1ec7 tr\u1ee5c <img loading=\"lazy\" decoding=\"async\" width=\"55\" height=\"27\" class=\"wp-image-24999\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_261-43.png\" alt=\"IMG_261\" \/><\/p>\n<p><strong>&#8211; <\/strong>M\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25000\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_262-44.png\" alt=\"IMG_262\" \/> t\u00e2m <img loading=\"lazy\" decoding=\"async\" width=\"76\" height=\"34\" class=\"wp-image-25001\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_263-45.png\" alt=\"IMG_263\" \/> b\u00e1n k\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"22\" class=\"wp-image-25002\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_264-44.png\" alt=\"IMG_264\" \/> c\u00f3 ph\u01b0\u01a1ng tr\u00ecnh l\u00e0: <img loading=\"lazy\" decoding=\"async\" width=\"271\" height=\"36\" class=\"wp-image-25003\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_265-44.png\" alt=\"IMG_265\" \/><\/p>\n<p><strong>&#8211; <\/strong>Ph\u01b0\u01a1ng tr\u00ecnh: <img loading=\"lazy\" decoding=\"async\" width=\"311\" height=\"31\" class=\"wp-image-25004\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_266-44.png\" alt=\"IMG_266\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_266-44.png 311w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_266-44-300x30.png 300w\" sizes=\"(max-width: 311px) 100vw, 311px\" \/> v\u1edbi <img loading=\"lazy\" decoding=\"async\" width=\"156\" height=\"27\" class=\"wp-image-25005\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_267-45.png\" alt=\"IMG_267\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_267-45.png 156w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_267-45-150x27.png 150w\" sizes=\"(max-width: 156px) 100vw, 156px\" \/> l\u00e0 ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t c\u1ea7u t\u00e2m <img loading=\"lazy\" decoding=\"async\" width=\"86\" height=\"34\" class=\"wp-image-25006\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_268-45.png\" alt=\"IMG_268\" \/> b\u00e1n k\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"175\" height=\"34\" class=\"wp-image-25007\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_269-45.png\" alt=\"IMG_269\" \/> .<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"315\" height=\"290\" class=\"wp-image-25008\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_270-43.png\" alt=\"IMG_270\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_270-43.png 315w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_270-43-300x276.png 300w\" sizes=\"(max-width: 315px) 100vw, 315px\" \/><\/p>\n<p><strong>2. V\u1ecb tr\u00ed t\u01b0\u01a1ng \u0111\u1ed1i c\u1ee7a m\u1eb7t ph\u1eb3ng <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"34\" class=\"wp-image-25009\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_271-45.png\" alt=\"IMG_271\" \/><strong> v\u00e0 m\u1eb7t c\u1ea7u<\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25010\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_272-45.png\" alt=\"IMG_272\" \/><\/p>\n<p>\u00d8 <img loading=\"lazy\" decoding=\"async\" width=\"115\" height=\"34\" class=\"wp-image-25011\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_273-43.png\" alt=\"IMG_273\" \/> khi v\u00e0 ch\u1ec9 khi <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"34\" class=\"wp-image-25012\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_274-44.png\" alt=\"IMG_274\" \/> kh\u00f4ng c\u1eaft m\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"39\" height=\"34\" class=\"wp-image-25013\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_275-43.png\" alt=\"IMG_275\" \/><\/p>\n<p>\u00d8 <img loading=\"lazy\" decoding=\"async\" width=\"115\" height=\"34\" class=\"wp-image-25014\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_276-44.png\" alt=\"IMG_276\" \/> khi v\u00e0 ch\u1ec9 khi <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"34\" class=\"wp-image-25015\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_277-44.png\" alt=\"IMG_277\" \/> ti\u1ebfp x\u00fac m\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"39\" height=\"34\" class=\"wp-image-25016\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_278-45.png\" alt=\"IMG_278\" \/><\/p>\n<p>\u00d8 <img loading=\"lazy\" decoding=\"async\" width=\"115\" height=\"34\" class=\"wp-image-25017\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_279-43.png\" alt=\"IMG_279\" \/> khi v\u00e0 ch\u1ec9 khi <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"34\" class=\"wp-image-25018\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_280-45.png\" alt=\"IMG_280\" \/> c\u1eaft m\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25019\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_281-44.png\" alt=\"IMG_281\" \/> theo<\/p>\n<p>giao tuy\u1ebfn l\u00e0 \u0111\u01b0\u1eddng tr\u00f2n n\u1eb1m tr\u00ean m\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"34\" class=\"wp-image-25020\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_282-45.png\" alt=\"IMG_282\" \/> c\u00f3 t\u00e2m<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"22\" class=\"wp-image-25021\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_283-44.png\" alt=\"IMG_283\" \/> v\u00e0 c\u00f3 b\u00e1n k\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"114\" height=\"34\" class=\"wp-image-25022\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_284-44.png\" alt=\"IMG_284\" \/><\/p>\n<p><strong>3. V\u1ecb tr\u00ed t\u01b0\u01a1ng \u0111\u1ed1i gi\u1eefa m\u1eb7t c\u1ea7u v\u00e0 \u0111\u01b0\u1eddng th\u1eb3ng<\/strong><\/p>\n<p>a) Cho m\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"71\" height=\"34\" class=\"wp-image-25023\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_285-45.png\" alt=\"IMG_285\" \/> v\u00e0 \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"22\" class=\"wp-image-25024\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_286-44.png\" alt=\"IMG_286\" \/> . G\u1ecdi <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"22\" class=\"wp-image-25025\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_287-45.png\" alt=\"IMG_287\" \/> l\u00e0 h\u00ecnh chi\u1ebfu c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"24\" class=\"wp-image-25026\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_288-45.png\" alt=\"IMG_288\" \/> l\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"22\" class=\"wp-image-25027\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_289-46.png\" alt=\"IMG_289\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"71\" height=\"24\" class=\"wp-image-25028\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_290-45.png\" alt=\"IMG_290\" \/> l\u00e0 kho\u1ea3ng c\u00e1ch t\u1eeb <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"24\" class=\"wp-image-25029\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_291-44.png\" alt=\"IMG_291\" \/> \u0111\u1ebfn <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"22\" class=\"wp-image-25030\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_292-45.png\" alt=\"IMG_292\" \/><\/p>\n<table>\n<tbody>\n<tr>\n<td><img loading=\"lazy\" decoding=\"async\" width=\"294\" height=\"247\" class=\"wp-image-25031\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_293-45.png\" alt=\"IMG_293\" \/><\/td>\n<td><img loading=\"lazy\" decoding=\"async\" width=\"244\" height=\"226\" class=\"wp-image-25032\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_294-44.png\" alt=\"IMG_294\" \/><\/td>\n<td><img loading=\"lazy\" decoding=\"async\" width=\"284\" height=\"274\" class=\"wp-image-25033\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_295-43.png\" alt=\"IMG_295\" \/><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u00d8 N\u1ebfu <img loading=\"lazy\" decoding=\"async\" width=\"51\" height=\"24\" class=\"wp-image-25034\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_296-43.png\" alt=\"IMG_296\" \/> th\u00ec <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"22\" class=\"wp-image-25035\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_297-43.png\" alt=\"IMG_297\" \/> c\u1eaft m\u1eb7t c\u1ea7u t\u1ea1i 2 \u0111i\u1ec3m ph\u00e2n bi\u1ec7t (H.3.1)<\/p>\n<p>\u00d8 N\u1ebfu <img loading=\"lazy\" decoding=\"async\" width=\"51\" height=\"24\" class=\"wp-image-25036\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_298-43.png\" alt=\"IMG_298\" \/> th\u00ec <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"22\" class=\"wp-image-25037\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_299-44.png\" alt=\"IMG_299\" \/> c\u1eaft m\u1eb7t c\u1ea7u t\u1ea1i 1 \u0111i\u1ec3m duy nh\u1ea5t (H.3.2)<\/p>\n<p>\u00d8 N\u1ebfu <img loading=\"lazy\" decoding=\"async\" width=\"51\" height=\"24\" class=\"wp-image-25038\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_300-44.png\" alt=\"IMG_300\" \/> th\u00ec <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"22\" class=\"wp-image-25039\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_301-44.png\" alt=\"IMG_301\" \/> kh\u00f4ng c\u1eaft m\u1eb7t c\u1ea7u (H.3.3)<\/p>\n<p><strong>B &#8211; C\u00c1C D\u1ea0NG TO\u00c1N V\u1ec0 PH\u01af\u01a0NG TR\u00ccNH M\u1eb6T C\u1ea6U<\/strong><\/p>\n<p><strong><em>D\u1ea1ng 1. Bi\u1ebft tr\u01b0\u1edbc t\u00e2m <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"34\" class=\"wp-image-25040\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_302-44.png\" alt=\"IMG_302\" \/><strong><em> v\u00e0 b\u00e1n k\u00ednh<\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"22\" class=\"wp-image-25041\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_303-44.png\" alt=\"IMG_303\" \/><strong><em>: <\/em><\/strong>Ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"339\" height=\"37\" class=\"wp-image-25042\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_304-44.png\" alt=\"IMG_304\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_304-44.png 339w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_304-44-300x33.png 300w\" sizes=\"(max-width: 339px) 100vw, 339px\" \/><\/p>\n<p><strong><em>D\u1ea1ng 2. T\u00e2m <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"22\" class=\"wp-image-25043\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_305-44.png\" alt=\"IMG_305\" \/><strong><em> v\u00e0 \u0111i qua \u0111i\u1ec3m<\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"22\" class=\"wp-image-25044\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_306-44.png\" alt=\"IMG_306\" \/><strong><em>: <\/em><\/strong><\/p>\n<p>\u00b7 B\u00e1n k\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"59\" height=\"22\" class=\"wp-image-25045\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_307-44.png\" alt=\"IMG_307\" \/><\/p>\n<p>\u00b7 Ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"339\" height=\"37\" class=\"wp-image-25046\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_308-44.png\" alt=\"IMG_308\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_308-44.png 339w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_308-44-300x33.png 300w\" sizes=\"(max-width: 339px) 100vw, 339px\" \/> .<\/p>\n<p><strong><em>D\u1ea1ng 3. M\u1eb7t c\u1ea7u \u0111\u01b0\u1eddng k\u00ednh <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"22\" class=\"wp-image-25047\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_309-43.png\" alt=\"IMG_309\" \/><\/p>\n<p>\u00b7 T\u00e2m <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"22\" class=\"wp-image-25048\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_310-44.png\" alt=\"IMG_310\" \/> l\u00e0 trung \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"22\" class=\"wp-image-25049\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_311-43.png\" alt=\"IMG_311\" \/><em>: <\/em> <img loading=\"lazy\" decoding=\"async\" width=\"339\" height=\"56\" class=\"wp-image-25050\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_312-43.png\" alt=\"IMG_312\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_312-43.png 339w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_312-43-300x50.png 300w\" sizes=\"(max-width: 339px) 100vw, 339px\" \/><\/p>\n<p>\u00b7 B\u00e1n k\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"75\" height=\"22\" class=\"wp-image-25051\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_313-42.png\" alt=\"IMG_313\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"55\" class=\"wp-image-25052\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_314-42.png\" alt=\"IMG_314\" \/><\/p>\n<p>\u00b7 Ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"339\" height=\"37\" class=\"wp-image-25053\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_315-42.png\" alt=\"IMG_315\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_315-42.png 339w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_315-42-300x33.png 300w\" sizes=\"(max-width: 339px) 100vw, 339px\" \/> .<\/p>\n<p><strong><em>D\u1ea1ng 4. M\u1eb7t c\u1ea7u t\u00e2m <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"34\" class=\"wp-image-25054\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_316-42.png\" alt=\"IMG_316\" \/><strong><em> ti\u1ebfp x\u00fac m\u1eb7t ph\u1eb3ng <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"34\" class=\"wp-image-25055\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_317-42.png\" alt=\"IMG_317\" \/><strong><em>:<\/em><\/strong><\/p>\n<p>\u00b7 B\u00e1n k\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"269\" height=\"60\" class=\"wp-image-25056\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_318-42.png\" alt=\"IMG_318\" \/><\/p>\n<p>\u00b7 Ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"339\" height=\"37\" class=\"wp-image-25057\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_319-42.png\" alt=\"IMG_319\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_319-42.png 339w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_319-42-300x33.png 300w\" sizes=\"(max-width: 339px) 100vw, 339px\" \/> .<\/p>\n<p><strong><em>D\u1ea1ng 5. M\u1eb7t c\u1ea7u ngo\u1ea1i ti\u1ebfp t\u1ee9 di\u1ec7n <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"60\" height=\"24\" class=\"wp-image-25058\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_320-42.png\" alt=\"IMG_320\" \/><strong><em> (\u0111i qua 4 \u0111i\u1ec3m <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"85\" height=\"27\" class=\"wp-image-25059\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_321-41.png\" alt=\"IMG_321\" \/><strong><em>) <\/em><\/strong><\/p>\n<p>\u00b7 Gi\u1ea3 s\u1eed m\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25060\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_322-41.png\" alt=\"IMG_322\" \/> c\u00f3 d\u1ea1ng: <img loading=\"lazy\" decoding=\"async\" width=\"334\" height=\"34\" class=\"wp-image-25061\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_323-39.png\" alt=\"IMG_323\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_323-39.png 334w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_323-39-300x31.png 300w\" sizes=\"(max-width: 334px) 100vw, 334px\" \/><\/p>\n<p>\u00b7 Th\u1ebf t\u1ecda \u0111\u1ed9 c\u1ee7a \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"85\" height=\"27\" class=\"wp-image-25062\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_324-39.png\" alt=\"IMG_324\" \/> v\u00e0o ph\u01b0\u01a1ng tr\u00ecnh (2) ta \u0111\u01b0\u1ee3c 4 ph\u01b0\u01a1ng tr\u00ecnh<\/p>\n<p>\u00b7 Gi\u1ea3i h\u1ec7 ph\u01b0\u01a1ng tr\u00ecnh t\u00ecm <img loading=\"lazy\" decoding=\"async\" width=\"70\" height=\"27\" class=\"wp-image-25063\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_325-39.png\" alt=\"IMG_325\" \/><\/p>\n<p>\u00b7 Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t c\u1ea7u.<\/p>\n<p><strong><em>D\u1ea1ng 6. M\u1eb7t c\u1ea7u \u0111i qua <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"62\" height=\"27\" class=\"wp-image-25064\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_326-39.png\" alt=\"IMG_326\" \/><strong><em> v\u00e0 t\u00e2m <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"242\" height=\"34\" class=\"wp-image-25065\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_327-39.png\" alt=\"IMG_327\" \/><strong><em>:<\/em><\/strong><\/p>\n<p>\u00b7 Gi\u1ea3 s\u1eed m\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25066\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_328-38.png\" alt=\"IMG_328\" \/> c\u00f3 d\u1ea1ng: <img loading=\"lazy\" decoding=\"async\" width=\"334\" height=\"34\" class=\"wp-image-25067\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_329-37.png\" alt=\"IMG_329\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_329-37.png 334w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_329-37-300x31.png 300w\" sizes=\"(max-width: 334px) 100vw, 334px\" \/><\/p>\n<p>\u00b7 Th\u1ebf t\u1ecda \u0111\u1ed9 c\u1ee7a \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"62\" height=\"27\" class=\"wp-image-25068\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_330-38.png\" alt=\"IMG_330\" \/> v\u00e0o ph\u01b0\u01a1ng tr\u00ecnh (2) ta \u0111\u01b0\u1ee3c 3 ph\u01b0\u01a1ng tr\u00ecnh<\/p>\n<p>\u00b7 <img loading=\"lazy\" decoding=\"async\" width=\"322\" height=\"34\" class=\"wp-image-25069\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_331-37.png\" alt=\"IMG_331\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_331-37.png 322w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_331-37-300x32.png 300w\" sizes=\"(max-width: 322px) 100vw, 322px\" \/><\/p>\n<p>\u00b7 Gi\u1ea3i h\u1ec7 4 ph\u01b0\u01a1ng tr\u00ecnh t\u00ecm <img loading=\"lazy\" decoding=\"async\" width=\"70\" height=\"27\" class=\"wp-image-25070\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_332-38.png\" alt=\"IMG_332\" \/><\/p>\n<p>\u00b7 Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t c\u1ea7u.<\/p>\n<p><strong><em>D\u1ea1ng 7. M\u1eb7t c\u1ea7u<\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25071\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_333-38.png\" alt=\"IMG_333\" \/><strong><em>\u0111i qua hai \u0111i\u1ec3m <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"40\" height=\"27\" class=\"wp-image-25072\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_334-36.png\" alt=\"IMG_334\" \/><strong><em> v\u00e0 t\u00e2m thu\u1ed9c \u0111\u01b0\u1eddng th\u1eb3ng <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"24\" class=\"wp-image-25073\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_335-37.png\" alt=\"IMG_335\" \/><\/p>\n<p><strong><em>C\u00e1ch 1:<\/em><\/strong><\/p>\n<p>\u00b7 Tham s\u1ed1 h\u00f3a t\u1ecda \u0111\u1ed9 t\u00e2m <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"22\" class=\"wp-image-25074\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_336-37.png\" alt=\"IMG_336\" \/> theo \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"24\" class=\"wp-image-25075\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_337-37.png\" alt=\"IMG_337\" \/> (tham s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"12\" height=\"20\" class=\"wp-image-25076\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_338-36.png\" alt=\"IMG_338\" \/> )<\/p>\n<p>\u00b7 Ta c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"89\" height=\"27\" class=\"wp-image-25077\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_339-36.png\" alt=\"IMG_339\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"229\" height=\"27\" class=\"wp-image-25078\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_340-36.png\" alt=\"IMG_340\" \/> . Gi\u1ea3i pt t\u00ecm ra <img loading=\"lazy\" decoding=\"async\" width=\"39\" height=\"24\" class=\"wp-image-25079\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_341-36.png\" alt=\"IMG_341\" \/> t\u1ecda \u0111\u1ed9 <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"22\" class=\"wp-image-25080\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_342-36.png\" alt=\"IMG_342\" \/> , t\u00ednh \u0111\u01b0\u1ee3c <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"22\" class=\"wp-image-25081\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_343-35.png\" alt=\"IMG_343\" \/> .<\/p>\n<p><strong><em>C\u00e1ch 2:<\/em><\/strong><\/p>\n<p>\u00b7 Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t ph\u1eb3ng trung tr\u1ef1c <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"34\" class=\"wp-image-25082\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_344-35.png\" alt=\"IMG_344\" \/> c\u1ee7a \u0111o\u1ea1n th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"22\" class=\"wp-image-25083\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_345-35.png\" alt=\"IMG_345\" \/> .<\/p>\n<p>\u00b7 T\u00e2m m\u1eb7t c\u1ea7u l\u00e0 giao c\u1ee7a m\u1eb7t ph\u1eb3ng trung tr\u1ef1c tr\u00ean v\u00e0 \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"24\" class=\"wp-image-25084\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_346-34.png\" alt=\"IMG_346\" \/> (gi\u1ea3i h\u1ec7 t\u00ecm t\u1ecda \u0111\u1ed9 t\u00e2m <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"22\" class=\"wp-image-25085\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_347-33.png\" alt=\"IMG_347\" \/> )<\/p>\n<p>\u00b7 B\u00e1n k\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"59\" height=\"22\" class=\"wp-image-25086\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_348-32.png\" alt=\"IMG_348\" \/> . Suy ra ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t c\u1ea7u c\u1ea7n t\u00ecm.<br \/>\n<em>(Ch\u00fa \u00fd: N\u1ebfu <\/em> <img loading=\"lazy\" decoding=\"async\" width=\"37\" height=\"24\" class=\"wp-image-25087\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_349-32.png\" alt=\"IMG_349\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"34\" class=\"wp-image-25088\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_350-32.png\" alt=\"IMG_350\" \/><em> ho\u1eb7c <\/em> <img loading=\"lazy\" decoding=\"async\" width=\"39\" height=\"24\" class=\"wp-image-25089\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_351-32.png\" alt=\"IMG_351\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"34\" class=\"wp-image-25090\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_352-32.png\" alt=\"IMG_352\" \/><em> th\u00ec kh\u00f4ng s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c c\u00e1ch 2 n\u00e0y)<\/em><\/p>\n<p><strong><em>D\u1ea1ng 8. M\u1eb7t c\u1ea7u <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25091\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_353-32.png\" alt=\"IMG_353\" \/><strong><em> c\u00f3 t\u00e2m <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"22\" class=\"wp-image-25092\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_354-32.png\" alt=\"IMG_354\" \/><strong><em> v\u00e0 ti\u1ebfp x\u00fac v\u1edbi m\u1eb7t c\u1ea7u <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25093\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_355-32.png\" alt=\"IMG_355\" \/><strong><em> cho tr\u01b0\u1edbc:<\/em><\/strong><\/p>\n<p>\u00b7 X\u00e1c \u0111\u1ecbnh t\u00e2m <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"24\" class=\"wp-image-25094\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_356-31.png\" alt=\"IMG_356\" \/> v\u00e0 b\u00e1n k\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"25\" height=\"22\" class=\"wp-image-25095\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_357-32.png\" alt=\"IMG_357\" \/> c\u1ee7a m\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25096\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_358-32.png\" alt=\"IMG_358\" \/><\/p>\n<p>\u00b7 S\u1eed d\u1ee5ng \u0111i\u1ec1u ki\u1ec7n ti\u1ebfp x\u00fac c\u1ee7a hai m\u1eb7t c\u1ea7u \u0111\u1ec3 t\u00ednh b\u00e1n k\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"22\" class=\"wp-image-25097\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_359-30.png\" alt=\"IMG_359\" \/> c\u1ee7a m\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"39\" height=\"34\" class=\"wp-image-25098\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_360-29.png\" alt=\"IMG_360\" \/><\/p>\n<p>(X\u00e9t hai tr\u01b0\u1eddng h\u1ee3p ti\u1ebfp x\u00fac trong v\u00e0 ti\u1ebfp x\u00fac ngo\u00e0i)<\/p>\n<p><strong><em>D\u1ea1ng 9. M\u1eb7t c\u1ea7u <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"39\" height=\"34\" class=\"wp-image-25099\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_361-28.png\" alt=\"IMG_361\" \/><strong><em> \u0111\u1ed1i x\u1ee9ng M\u1eb7t c\u1ea7u <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25100\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_362-28.png\" alt=\"IMG_362\" \/><strong><em> qua m\u1eb7t ph\u1eb3ng <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"34\" class=\"wp-image-25101\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_363-25.png\" alt=\"IMG_363\" \/><\/p>\n<p>\u00b7 T\u00ecm \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"22\" class=\"wp-image-25102\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_364-27.png\" alt=\"IMG_364\" \/> \u0111\u1ed1i x\u1ee9ng v\u1edbi t\u00e2m <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"22\" class=\"wp-image-25103\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_365-27.png\" alt=\"IMG_365\" \/> qua mp <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"34\" class=\"wp-image-25104\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_366-27.png\" alt=\"IMG_366\" \/><\/p>\n<p>\u00b7 Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t c\u1ea7u (S\u2019) t\u00e2m <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"22\" class=\"wp-image-25105\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_367-27.png\" alt=\"IMG_367\" \/> c\u00f3 b\u00e1n k\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"59\" height=\"22\" class=\"wp-image-25106\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_368-26.png\" alt=\"IMG_368\" \/> .<\/p>\n<p><strong><em>D\u1ea1ng 10. M\u1eb7t c\u1ea7u <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"39\" height=\"34\" class=\"wp-image-25107\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_369-26.png\" alt=\"IMG_369\" \/><strong><em> \u0111\u1ed1i x\u1ee9ng m\u1eb7t c\u1ea7u <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25108\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_370-26.png\" alt=\"IMG_370\" \/><strong><em> qua \u0111\u01b0\u1eddng th\u1eb3ng <\/em><\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"24\" class=\"wp-image-25109\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_371-26.png\" alt=\"IMG_371\" \/><\/p>\n<p>\u00b7 T\u00ecm \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"22\" class=\"wp-image-25110\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_372-26.png\" alt=\"IMG_372\" \/> \u0111\u1ed1i x\u1ee9ng v\u1edbi t\u00e2m <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"22\" class=\"wp-image-25111\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_373-25.png\" alt=\"IMG_373\" \/> qua mp <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"24\" class=\"wp-image-25112\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_374-24.png\" alt=\"IMG_374\" \/> (xem c\u00e1ch l\u00e0m \u1edf ph\u1ea7n \u0111\u01b0\u1eddng th\u1eb3ng)<\/p>\n<p>\u00b7 Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t c\u1ea7u (S\u2019) t\u00e2m <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"22\" class=\"wp-image-25113\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_375-24.png\" alt=\"IMG_375\" \/> c\u00f3 b\u00e1n k\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"59\" height=\"22\" class=\"wp-image-25114\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_376-23.png\" alt=\"IMG_376\" \/> .<\/p>\n<h2><strong>C \u2013 B\u00c0I T\u1eacP TR\u1eaeC NGHI\u1ec6M<\/strong><\/h2>\n<p><strong>C\u00e2u 1: <\/strong>Trong kh\u00f4ng gian v\u1edbi h\u1ec7 tr\u1ee5c t\u1ecda \u0111\u1ed9 <img loading=\"lazy\" decoding=\"async\" width=\"47\" height=\"28\" class=\"wp-image-25115\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_377-22.png\" alt=\"IMG_377\" \/> , cho ba \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"170\" height=\"34\" class=\"wp-image-25116\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_378-21.png\" alt=\"IMG_378\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"88\" height=\"34\" class=\"wp-image-25117\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_379-21.png\" alt=\"IMG_379\" \/> . M\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25118\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_380-21.png\" alt=\"IMG_380\" \/> t\u00e2m I \u0111i qua <img loading=\"lazy\" decoding=\"async\" width=\"62\" height=\"28\" class=\"wp-image-25119\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_381-21.png\" alt=\"IMG_381\" \/> v\u00e0 \u0111\u1ed9 d\u00e0i <img loading=\"lazy\" decoding=\"async\" width=\"74\" height=\"30\" class=\"wp-image-25120\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_382-21.png\" alt=\"IMG_382\" \/> (bi\u1ebft t\u00e2m I c\u00f3 ho\u00e0nh \u0111\u1ed9 nguy\u00ean, O l\u00e0 g\u1ed1c t\u1ecda \u0111\u1ed9). B\u00e1n k\u00ednh m\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25121\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_383-21.png\" alt=\"IMG_383\" \/> l\u00e0<\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"47\" height=\"22\" class=\"wp-image-25122\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_384-21.png\" alt=\"IMG_384\" \/> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"24\" class=\"wp-image-25123\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_385-20.png\" alt=\"IMG_385\" \/> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"22\" class=\"wp-image-25124\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_386-20.png\" alt=\"IMG_386\" \/> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"64\" height=\"30\" class=\"wp-image-25125\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_387-18.png\" alt=\"IMG_387\" \/><\/p>\n<p><strong>C\u00e2u 2: <\/strong>Trong kh\u00f4ng gian v\u1edbi h\u1ec7 t\u1ecda \u0111\u1ed9 <img loading=\"lazy\" decoding=\"async\" width=\"52\" height=\"27\" class=\"wp-image-25126\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_388-16.png\" alt=\"IMG_388\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_388-16.png 52w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_388-16-50x27.png 50w\" sizes=\"(max-width: 52px) 100vw, 52px\" \/> cho <img loading=\"lazy\" decoding=\"async\" width=\"279\" height=\"34\" class=\"wp-image-25127\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_389-14.png\" alt=\"IMG_389\" \/> Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t c\u1ea7u c\u00f3 t\u00e2m thu\u1ed9c tr\u1ee5c <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"27\" class=\"wp-image-25128\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_390-15.png\" alt=\"IMG_390\" \/> \u0111i qua <img loading=\"lazy\" decoding=\"async\" width=\"20\" height=\"22\" class=\"wp-image-25129\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_391-14.png\" alt=\"IMG_391\" \/> v\u00e0 c\u1eaft m\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"62\" height=\"34\" class=\"wp-image-25130\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_392-15.png\" alt=\"IMG_392\" \/> theo m\u1ed9t \u0111\u01b0\u1eddng tr\u00f2n c\u00f3 b\u00e1n k\u00ednh nh\u1ecf nh\u1ea5t.<\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"182\" height=\"62\" class=\"wp-image-25131\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_393-15.png\" alt=\"IMG_393\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"184\" height=\"62\" class=\"wp-image-25132\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_394-15.png\" alt=\"IMG_394\" \/> .<\/p>\n<p><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"182\" height=\"62\" class=\"wp-image-25133\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_395-14.png\" alt=\"IMG_395\" \/> . <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"182\" height=\"62\" class=\"wp-image-25134\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_396-14.png\" alt=\"IMG_396\" \/><\/p>\n<p><strong>C\u00e2u 3: <\/strong>Trong kh\u00f4ng gian v\u1edbi h\u1ec7 t\u1ecda \u0111\u1ed9 <img loading=\"lazy\" decoding=\"async\" width=\"52\" height=\"27\" class=\"wp-image-25135\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_397-14.png\" alt=\"IMG_397\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_397-14.png 52w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_397-14-50x27.png 50w\" sizes=\"(max-width: 52px) 100vw, 52px\" \/> vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t c\u1ea7u c\u00f3 t\u00e2m <img loading=\"lazy\" decoding=\"async\" width=\"74\" height=\"34\" class=\"wp-image-25136\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_398-15.png\" alt=\"IMG_398\" \/> v\u00e0 ti\u1ebfp x\u00fac v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"120\" height=\"52\" class=\"wp-image-25137\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_399-15.png\" alt=\"IMG_399\" \/><\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"274\" height=\"52\" class=\"wp-image-25138\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_400-15.png\" alt=\"IMG_400\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"274\" height=\"52\" class=\"wp-image-25139\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_401-15.png\" alt=\"IMG_401\" \/> .<\/p>\n<p><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"283\" height=\"52\" class=\"wp-image-25140\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_402-15.png\" alt=\"IMG_402\" \/> . <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"274\" height=\"52\" class=\"wp-image-25141\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_403-15.png\" alt=\"IMG_403\" \/><\/p>\n<p><strong>C\u00e2u 4: <\/strong>Trong kh\u00f4ng gian v\u1edbi h\u1ec7 t\u1ecda \u0111\u1ed9 <img loading=\"lazy\" decoding=\"async\" width=\"52\" height=\"27\" class=\"wp-image-25142\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_404-15.png\" alt=\"IMG_404\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_404-15.png 52w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_404-15-50x27.png 50w\" sizes=\"(max-width: 52px) 100vw, 52px\" \/> cho m\u1eb7t c\u1ea7u c\u00f3 ph\u01b0\u01a1ng tr\u00ecnh<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"280\" height=\"31\" class=\"wp-image-25143\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_405-15.png\" alt=\"IMG_405\" \/> v\u00e0 \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"227\" height=\"27\" class=\"wp-image-25144\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_406-15.png\" alt=\"IMG_406\" \/> Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"22\" class=\"wp-image-25145\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_407-15.png\" alt=\"IMG_407\" \/> ti\u1ebfp x\u00fac m\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25146\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_408-15.png\" alt=\"IMG_408\" \/> t\u1ea1i \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"34\" class=\"wp-image-25147\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_409-15.png\" alt=\"IMG_409\" \/> bi\u1ebft \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"22\" class=\"wp-image-25148\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_410-15.png\" alt=\"IMG_410\" \/> t\u1ea1o v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"24\" class=\"wp-image-25149\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_411-15.png\" alt=\"IMG_411\" \/> m\u1ed9t g\u00f3c <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"22\" class=\"wp-image-25150\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_412-15.png\" alt=\"IMG_412\" \/> th\u1ecfa m\u00e3n <img loading=\"lazy\" decoding=\"async\" width=\"100\" height=\"55\" class=\"wp-image-25151\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_413-15.png\" alt=\"IMG_413\" \/><\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"248\" height=\"94\" class=\"wp-image-25152\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_414-15.png\" alt=\"IMG_414\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"248\" height=\"94\" class=\"wp-image-25153\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_415-15.png\" alt=\"IMG_415\" \/> .<\/p>\n<p><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"248\" height=\"94\" class=\"wp-image-25154\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_416-15.png\" alt=\"IMG_416\" \/> . <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"248\" height=\"94\" class=\"wp-image-25155\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_417-15.png\" alt=\"IMG_417\" \/><\/p>\n<p><strong>C\u00e2u 5: <\/strong>Trong kh\u00f4ng gian v\u1edbi h\u1ec7 t\u1ecda \u0111\u1ed9 <img loading=\"lazy\" decoding=\"async\" width=\"52\" height=\"27\" class=\"wp-image-25156\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_418-15.png\" alt=\"IMG_418\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_418-15.png 52w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_418-15-50x27.png 50w\" sizes=\"(max-width: 52px) 100vw, 52px\" \/> cho \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"179\" height=\"52\" class=\"wp-image-25157\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_419-14.png\" alt=\"IMG_419\" \/> T\u00ecm t\u1ecda \u0111\u1ed9 \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"27\" height=\"22\" class=\"wp-image-25158\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_420-14.png\" alt=\"IMG_420\" \/> thu\u1ed9c \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"24\" class=\"wp-image-25159\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_421-14.png\" alt=\"IMG_421\" \/> sao cho m\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25160\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_422-14.png\" alt=\"IMG_422\" \/> t\u00e2m <img loading=\"lazy\" decoding=\"async\" width=\"27\" height=\"22\" class=\"wp-image-25161\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_423-14.png\" alt=\"IMG_423\" \/> ti\u1ebfp x\u00fac v\u1edbi tr\u1ee5c <img loading=\"lazy\" decoding=\"async\" width=\"30\" height=\"24\" class=\"wp-image-25162\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_424-14.png\" alt=\"IMG_424\" \/> c\u00f3 b\u00e1n k\u00ednh b\u1eb1ng 2.<\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"232\" height=\"56\" class=\"wp-image-25163\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_425-14.png\" alt=\"IMG_425\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"207\" height=\"56\" class=\"wp-image-25164\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_426-14.png\" alt=\"IMG_426\" \/> .<\/p>\n<p><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"232\" height=\"56\" class=\"wp-image-25165\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_427-14.png\" alt=\"IMG_427\" \/> . <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"232\" height=\"56\" class=\"wp-image-25166\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_428-14.png\" alt=\"IMG_428\" \/><\/p>\n<p><strong>C\u00e2u 6: <\/strong>Trong kh\u00f4ng gian v\u1edbi h\u1ec7 t\u1ecda \u0111\u1ed9 <img loading=\"lazy\" decoding=\"async\" width=\"52\" height=\"27\" class=\"wp-image-25167\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_429-14.png\" alt=\"IMG_429\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_429-14.png 52w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_429-14-50x27.png 50w\" sizes=\"(max-width: 52px) 100vw, 52px\" \/> cho hai \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"52\" height=\"31\" class=\"wp-image-25168\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_430-13.png\" alt=\"IMG_430\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_430-13.png 52w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_430-13-50x31.png 50w\" sizes=\"(max-width: 52px) 100vw, 52px\" \/> c\u00f3 ph\u01b0\u01a1ng tr\u00ecnh: <img loading=\"lazy\" decoding=\"async\" width=\"395\" height=\"52\" class=\"wp-image-25169\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_431-12.png\" alt=\"IMG_431\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_431-12.png 395w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_431-12-300x39.png 300w\" sizes=\"(max-width: 395px) 100vw, 395px\" \/> . Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t c\u1ea7u c\u00f3 b\u00e1n k\u00ednh nh\u1ecf nh\u1ea5t v\u00e0 ti\u1ebfp x\u00fac v\u1edbi hai \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"66\" height=\"31\" class=\"wp-image-25170\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_432-12.png\" alt=\"IMG_432\" \/><\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"172\" height=\"36\" class=\"wp-image-25171\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_433-12.png\" alt=\"IMG_433\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"172\" height=\"36\" class=\"wp-image-25172\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_434-12.png\" alt=\"IMG_434\" \/> .<\/p>\n<p><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"172\" height=\"36\" class=\"wp-image-25173\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_435-12.png\" alt=\"IMG_435\" \/> . <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"172\" height=\"36\" class=\"wp-image-25174\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_436-12.png\" alt=\"IMG_436\" \/><\/p>\n<p><strong>C\u00e2u 7: <\/strong>Trong kh\u00f4ng gian v\u1edbi h\u1ec7 t\u1ecda \u0111\u1ed9 <img loading=\"lazy\" decoding=\"async\" width=\"52\" height=\"27\" class=\"wp-image-25175\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_437-13.png\" alt=\"IMG_437\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_437-13.png 52w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_437-13-50x27.png 50w\" sizes=\"(max-width: 52px) 100vw, 52px\" \/> cho m\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"315\" height=\"34\" class=\"wp-image-25176\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_438-13.png\" alt=\"IMG_438\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_438-13.png 315w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_438-13-300x32.png 300w\" sizes=\"(max-width: 315px) 100vw, 315px\" \/><\/p>\n<p>Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"34\" class=\"wp-image-25177\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_439-13.png\" alt=\"IMG_439\" \/> ch\u1ee9a tr\u1ee5c <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"24\" class=\"wp-image-25178\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_440-13.png\" alt=\"IMG_440\" \/> v\u00e0 c\u1eaft m\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25179\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_441-13.png\" alt=\"IMG_441\" \/> theo m\u1ed9t \u0111\u01b0\u1eddng tr\u00f2n c\u00f3 b\u00e1n k\u00ednh b\u1eb1ng 3.<\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"126\" height=\"34\" class=\"wp-image-25180\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_442-13.png\" alt=\"IMG_442\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"124\" height=\"34\" class=\"wp-image-25181\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_443-11.png\" alt=\"IMG_443\" \/> . <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"126\" height=\"34\" class=\"wp-image-25182\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_444-11.png\" alt=\"IMG_444\" \/> . <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"126\" height=\"34\" class=\"wp-image-25183\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_445-11.png\" alt=\"IMG_445\" \/><\/p>\n<p><strong>C\u00e2u 8: <\/strong>Trong kh\u00f4ng gian v\u1edbi h\u1ec7 t\u1ecda \u0111\u1ed9 <img loading=\"lazy\" decoding=\"async\" width=\"55\" height=\"27\" class=\"wp-image-25184\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_446-10.png\" alt=\"IMG_446\" \/> cho \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"170\" height=\"52\" class=\"wp-image-25185\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_447-10.png\" alt=\"IMG_447\" \/> v\u00e0 c\u1eaft m\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"182\" height=\"34\" class=\"wp-image-25186\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_448-10.png\" alt=\"IMG_448\" \/> t\u1ea1i \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"31\" height=\"24\" class=\"wp-image-25187\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_449-8.png\" alt=\"IMG_449\" \/> Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"34\" class=\"wp-image-25188\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_450-8.png\" alt=\"IMG_450\" \/> c\u00f3 t\u00e2m <img loading=\"lazy\" decoding=\"async\" width=\"18\" height=\"22\" class=\"wp-image-25189\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_451-8.png\" alt=\"IMG_451\" \/> thu\u1ed9c \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"19\" height=\"24\" class=\"wp-image-25190\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_452-8.png\" alt=\"IMG_452\" \/> v\u00e0 ti\u1ebfp x\u00fac v\u1edbi m\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"34\" class=\"wp-image-25191\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_453-8.png\" alt=\"IMG_453\" \/> t\u1ea1i \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"26\" height=\"27\" class=\"wp-image-25192\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_454-8.png\" alt=\"IMG_454\" \/> bi\u1ebft di\u1ec7n t\u00edch tam gi\u00e1c <img loading=\"lazy\" decoding=\"async\" width=\"46\" height=\"22\" class=\"wp-image-25193\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_455-7.png\" alt=\"IMG_455\" \/> b\u1eb1ng <img loading=\"lazy\" decoding=\"async\" width=\"39\" height=\"31\" class=\"wp-image-25194\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_456-7.png\" alt=\"IMG_456\" \/> v\u00e0 t\u00e2m <img loading=\"lazy\" decoding=\"async\" width=\"18\" height=\"22\" class=\"wp-image-25195\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_457-7.png\" alt=\"IMG_457\" \/> c\u00f3 ho\u00e0nh \u0111\u1ed9 \u00e2m.<\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"246\" height=\"36\" class=\"wp-image-25196\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_458-7.png\" alt=\"IMG_458\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"255\" height=\"36\" class=\"wp-image-25197\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_459-7.png\" alt=\"IMG_459\" \/> .<\/p>\n<p><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"246\" height=\"36\" class=\"wp-image-25198\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_460-7.png\" alt=\"IMG_460\" \/> . <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"246\" height=\"36\" class=\"wp-image-25199\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_461-7.png\" alt=\"IMG_461\" \/><\/p>\n<p><strong>C\u00e2u 9: <\/strong>Trong kh\u00f4ng gian t\u1ecda \u0111\u1ed9 <img loading=\"lazy\" decoding=\"async\" width=\"52\" height=\"27\" class=\"wp-image-25200\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_462-6.png\" alt=\"IMG_462\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_462-6.png 52w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_462-6-50x27.png 50w\" sizes=\"(max-width: 52px) 100vw, 52px\" \/> vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t c\u1ea7u \u0111i qua ba \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"179\" height=\"34\" class=\"wp-image-25201\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_463-6.png\" alt=\"IMG_463\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"102\" height=\"34\" class=\"wp-image-25202\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_464-6.png\" alt=\"IMG_464\" \/> bi\u1ebft t\u00e2m c\u1ee7a m\u1eb7t c\u1ea7u n\u1eb1m tr\u00ean m\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"40\" height=\"24\" class=\"wp-image-25203\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_465-6.png\" alt=\"IMG_465\" \/><\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"315\" height=\"62\" class=\"wp-image-25204\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_466-6.png\" alt=\"IMG_466\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_466-6.png 315w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_466-6-300x59.png 300w\" sizes=\"(max-width: 315px) 100vw, 315px\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"315\" height=\"62\" class=\"wp-image-25205\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_467-6.png\" alt=\"IMG_467\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_467-6.png 315w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_467-6-300x59.png 300w\" sizes=\"(max-width: 315px) 100vw, 315px\" \/> .<\/p>\n<p><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"315\" height=\"62\" class=\"wp-image-25206\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_468-6.png\" alt=\"IMG_468\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_468-6.png 315w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_468-6-300x59.png 300w\" sizes=\"(max-width: 315px) 100vw, 315px\" \/> . <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"315\" height=\"62\" class=\"wp-image-25207\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_469-6.png\" alt=\"IMG_469\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_469-6.png 315w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_469-6-300x59.png 300w\" sizes=\"(max-width: 315px) 100vw, 315px\" \/><\/p>\n<p><strong>C\u00e2u 10: <\/strong>Trong kh\u00f4ng gian <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"27\" class=\"wp-image-25208\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_470-5.png\" alt=\"IMG_470\" \/> cho 3 \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"286\" height=\"34\" class=\"wp-image-25209\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_471-5.png\" alt=\"IMG_471\" \/> v\u00e0 m\u1eb7t c\u1ea7u<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"325\" height=\"34\" class=\"wp-image-25210\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_472-5.png\" alt=\"IMG_472\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_472-5.png 325w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_472-5-300x31.png 300w\" sizes=\"(max-width: 325px) 100vw, 325px\" \/> Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"34\" class=\"wp-image-25211\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_473-5.png\" alt=\"IMG_473\" \/> \u0111i qua qua <img loading=\"lazy\" decoding=\"async\" width=\"26\" height=\"27\" class=\"wp-image-25212\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_474-5.png\" alt=\"IMG_474\" \/> song song v\u1edbi <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"24\" class=\"wp-image-25213\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_475-5.png\" alt=\"IMG_475\" \/> v\u00e0 ti\u1ebfp x\u00fac v\u1edbi m\u1eb7t c\u1ea7u <img loading=\"lazy\" decoding=\"async\" width=\"68\" height=\"34\" class=\"wp-image-25214\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_476-5.png\" alt=\"IMG_476\" \/> c\u00f3 t\u00e2m <img loading=\"lazy\" decoding=\"async\" width=\"74\" height=\"34\" class=\"wp-image-25215\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_477-5.png\" alt=\"IMG_477\" \/> v\u00e0 c\u00f3 b\u00e1n k\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"55\" height=\"24\" class=\"wp-image-25216\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_478-5.png\" alt=\"IMG_478\" \/><\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"211\" height=\"34\" class=\"wp-image-25217\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_479-5.png\" alt=\"IMG_479\" \/> ho\u1eb7c <img loading=\"lazy\" decoding=\"async\" width=\"210\" height=\"34\" class=\"wp-image-25218\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_480-5.png\" alt=\"IMG_480\" \/> .<\/p>\n<p><strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"211\" height=\"34\" class=\"wp-image-25219\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_481-5.png\" alt=\"IMG_481\" \/> ho\u1eb7c <img loading=\"lazy\" decoding=\"async\" width=\"210\" height=\"34\" class=\"wp-image-25220\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_482-5.png\" alt=\"IMG_482\" \/> .<\/p>\n<p><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"211\" height=\"34\" class=\"wp-image-25221\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_483-5.png\" alt=\"IMG_483\" \/> ho\u1eb7c <img loading=\"lazy\" decoding=\"async\" width=\"210\" height=\"34\" class=\"wp-image-25222\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_484-5.png\" alt=\"IMG_484\" \/> .<\/p>\n<p><strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"222\" height=\"34\" class=\"wp-image-25223\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_485-5.png\" alt=\"IMG_485\" \/> ho\u1eb7c <img loading=\"lazy\" decoding=\"async\" width=\"219\" height=\"34\" class=\"wp-image-25224\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_486-5.png\" alt=\"IMG_486\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A &#8211; L\u00dd THUY\u1ebeT CHUNG 1. \u0110\u1ecbnh ngh\u0129a m\u1eb7t c\u1ea7u T\u1eadp h\u1ee3p c\u00e1c \u0111i\u1ec3m trong kh\u00f4ng gian c\u00e1ch \u0111i\u1ec3m c\u1ed1 \u0111\u1ecbnh m\u1ed9t kho\u1ea3ng c\u00e1ch cho tr\u01b0\u1edbc l\u00e0 m\u1eb7t c\u1ea7u t\u00e2m v\u00e0 b\u00e1n k\u00ednh K\u00ed hi\u1ec7u Trong kh\u00f4ng gian v\u1edbi h\u1ec7 tr\u1ee5c &#8211; M\u1eb7t c\u1ea7u t\u00e2m b\u00e1n k\u00ednh c\u00f3 ph\u01b0\u01a1ng tr\u00ecnh l\u00e0: &#8211; Ph\u01b0\u01a1ng tr\u00ecnh: v\u1edbi [&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":[43],"tags":[],"class_list":["post-24993","post","type-post","status-publish","format-standard","hentry","category-toan-lop-12"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/24993","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=24993"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/24993\/revisions"}],"predecessor-version":[{"id":25225,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/24993\/revisions\/25225"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=24993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=24993"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=24993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}