{"id":2503,"date":"2021-10-14T20:57:53","date_gmt":"2021-10-14T13:57:53","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=2503"},"modified":"2021-10-14T20:57:53","modified_gmt":"2021-10-14T13:57:53","slug":"uoc-va-boi-hoc-luyen-tap-nang-cao-va-sgk-vietlearn","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/uoc-va-boi-hoc-luyen-tap-nang-cao-va-sgk-vietlearn\/","title":{"rendered":"\u01af\u1edbc v\u00e0 b\u1ed9i \u2013 h\u1ecdc &amp; luy\u1ec7n t\u1eadp n\u00e2ng cao v\u00e0 SGK (Vietlearn)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong b\u00e0i tr\u01b0\u1edbc, ch\u00fang ta \u0111\u00e3 t\u00ecm hi\u1ec3u kh\u00e1 k\u1ef9 v\u1ec1 t\u00ednh ch\u1ea5t chia h\u1ebft c\u1ee7a m\u1ed9t t\u1ed5ng v\u00e0 c\u00e1c d\u1ea5u hi\u1ec7u chia h\u1ebft. Ng\u00e0y h\u00f4m nay, h\u00e3y h\u1ecdc c\u00e1ch t\u00ecm \u01b0\u1edbc v\u00e0 b\u1ed9i v\u00e0 l\u1eddi gi\u1ea3i b\u00e0i t\u1eadp s\u00e1ch gi\u00e1o khoa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u00fd thuy\u1ebft \u01af\u1edbc v\u00e0 b\u1ed9i<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Ph\u00e1t bi\u1ec3u:<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu c\u00f3 s\u1ed1 t\u1ef1 nhi\u00ean a chia h\u1ebft cho s\u1ed1 t\u1ef1 nhi\u00ean b th\u00ec ta n\u00f3i a l\u00e0 b\u1ed9i c\u1ee7a b c\u00f2n b l\u00e0 \u01b0\u1edbc c\u1ee7a a.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ed1 0 kh\u00f4ng l\u00e0 \u01b0\u1edbc c\u1ee7a b\u1ea5t k\u1ef3 s\u1ed1 t\u1ef1 nhi\u00ean n\u00e0o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ed5ng qu\u00e1t \u01af\u1edbc v\u00e0 b\u1ed9i l\u1edbp 6<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5: 6 \u205d 3<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta th\u1ea5y, 6 chia h\u1ebft cho 3 b\u1eb1ng 2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2192 6 l\u00e0 b\u1ed9i c\u1ee7a 3; c\u00f2n 3 l\u00e0 \u01b0\u1edbc c\u1ee7a 6<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">?1: S\u1ed1 18 c\u00f3 l\u00e0 b\u1ed9i c\u1ee7a 3 kh\u00f4ng? C\u00f3 l\u00e0 b\u1ed9i c\u1ee7a 4 kh\u00f4ng?<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>  S\u1ed1 4 c\u00f3 l\u00e0 \u01b0\u1edbc c\u1ee7a 12 kh\u00f4ng? C\u00f3 l\u00e0 \u01b0\u1edbc c\u1ee7a 15 kh\u00f4ng?<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Ta th\u1ea5y, 18 \u205d 3 = 6<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2192 18 l\u00e0 b\u1ed9i c\u1ee7a 3; c\u00f2n 3 l\u00e0 \u01b0\u1edbc c\u1ee7a 18<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta th\u1ea5y, 18 \u22ee\u0338 4<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2192 18 kh\u00f4ng l\u00e0 b\u1ed9i c\u1ee7a 4<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta th\u1ea5y, s\u1ed1 12 \u205d 4 \u2192 4 l\u00e0 \u01b0\u1edbc c\u1ee7a 12<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta th\u1ea5y, s\u1ed1 15 \u22ee\u0338 4 \u2192 4 kh\u00f4ng l\u00e0 \u01b0\u1edbc c\u1ee7a 15<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\"><li>C\u00e1ch t\u00ecm \u01b0\u1edbc v\u00e0 b\u1ed9i<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">a. K\u00fd hi\u1ec7u \u01b0\u1edbc v\u00e0 b\u1ed9i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eadp h\u1ee3p c\u1ee7a c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean a: \u01af(a)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eadp h\u1ee3p c\u00e1c b\u1ed9i c\u1ee7a s\u1ed1 t\u1ef1 nhi\u00ean a: B(a)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">b. C\u00e1ch t\u00ecm b\u1ed9i:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta c\u00f3 th\u1ec3 t\u00ecm c\u00e1c b\u1ed9i c\u1ee7a m\u1ed9t s\u1ed1 kh\u00e1c 0 b\u1eb1ng c\u00e1ch nh\u00e2n s\u1ed1 \u0111\u00f3 l\u1ea7n l\u01b0\u1ee3t v\u1edbi 0,1,2,3,\u2026<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch t\u00ecm b\u1ed9i c\u1ee7a a, ta l\u1ea5y a nh\u00e2n l\u1ea7n l\u01b0\u1ee3t: 0, 1, 2, 3,\u2026<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>L\u01b0u \u00fd:<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1edbi h\u1ea1n (nh\u1ecf h\u01a1n ho\u1eb7c kh\u00f4ng v\u01b0\u1ee3t s\u1ed1 bao nhi\u00eau).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu \u0111\u1ec1 kh\u00f4ng y\u00eau c\u1ea7u c\u00f3 gi\u1edbi h\u1ea1n, ta ch\u1ec9 nh\u00e2n t\u1ed1i \u0111a kho\u1ea3ng 4 \u0111\u1ebfn 5 s\u1ed1 r\u1ed3i ghi \u2026<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5: T\u00ecm c\u00e1c b\u1ed9i nh\u1ecf h\u01a1n 28 c\u1ee7a 4<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta c\u00f3 b\u1ed9i c\u1ee7a 7 v\u00e0 nh\u1ecf h\u01a1n 30 l\u00e0 nh\u1eefng s\u1ed1 sau:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B(4) = {0, 4, 8, 12, 20, 24}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">?2. T\u00ecm c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean x m\u00e0 x \u2208 B(8) v\u00e0 x &lt; 40<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta c\u00f3, B(8) = {0, 8, 16, 24, 32}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">c. C\u00e1ch t\u00ecm \u01b0\u1edbc<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta c\u00f3 th\u1ec3 t\u00ecm c\u00e1c \u01b0\u1edbc c\u1ee7a a (a&gt; 1) b\u1eb1ng c\u00e1ch l\u1ea7n l\u01b0\u1ee3t chia a cho c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean t\u1eeb 1 \u0111\u1ebfn a \u0111\u1ec3 x\u00e9t xem a chia h\u1ebft cho nh\u1eefng s\u1ed1 n\u00e0o, khi \u0111\u00f3 c\u00e1c s\u1ed1 \u1ea5y l\u00e0 \u01b0\u1edbc c\u1ee7a a.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u01af(a) = {1 \u2192 a}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch t\u00ecm \u01b0\u1edbc v\u00e0 b\u1ed9i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5: T\u00ecm c\u00e1c \u01b0\u1edbc c\u1ee7a 9<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta l\u1ea5y t\u1eadp h\u1ee3p s\u1ed1 chia h\u1ebft cho 9 t\u1eeb (1 \u2192 9) g\u1ed3m:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta c\u00f3, \u01af(9) = {1, 3, 9}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">?3. Vi\u1ebft c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a t\u1eadp h\u1ee3p \u01af(12)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta c\u00f3, \u01af(12) = {1, 2, 3, 4, 6, 12}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">?4. T\u00ecm c\u00e1c b\u01b0\u1edbc c\u1ee7a 1 v\u00e0 m\u1ed9t v\u00e0i b\u1ed9i c\u1ee7a 1:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta c\u00f3, \u01af(1) = {1}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta c\u00f3, B(1) = {0, 1, 2, 3 \u2026}<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>L\u01b0u \u00fd:<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ed1 ch\u1ec9 c\u00f3 1 \u01b0\u1edbc l\u00e0 1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ed1 1 l\u00e0 \u01b0\u1edbc c\u1ee7a b\u1ea5t k\u1ef3 s\u1ed1 t\u1ef1 nhi\u00ean n\u00e0o<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ed1 0 l\u00e0 b\u1ed9i c\u1ee7a m\u1ecdi s\u1ed1 t\u1ef1 nhi\u00ean<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ed1 0 kh\u00f4ng l\u00e0 \u01b0\u1edbc c\u1ee7a b\u1ea5t k\u1ef3 s\u1ed1 t\u1ef1 nhi\u00ean n\u00e0o<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>T\u1ea3i b\u1ed9 t\u00e0i li\u1ec7u v\u00e0 \u0111\u1ec1 thi Full m\u00f4n h\u1ecdc tuy\u1ec7t hay (c\u00f3 l\u1eddi gi\u1ea3i chi ti\u1ebft)<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp To\u00e1n 6: \u01af\u1edbc v\u00e0 b\u1ed9i (SGK)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 111 (trang 44 SGK To\u00e1n t\u1eadp 1)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp To\u00e1n 6: \u01af\u1edbc v\u00e0 b\u1ed9i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 112 (trang 44 SGK To\u00e1n t\u1eadp 1)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp 112 (trang 44 SGK)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 113 (trang 44 SGK To\u00e1n t\u1eadp 1)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp 113 (To\u00e1n 6: \u01af\u1edbc v\u00e0 b\u1ed9i)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 114 (trang 45 SGK)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec1 b\u00e0i t\u1eadp 114<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch chia S\u1ed1 nh\u00f3m S\u1ed1 ng\u01b0\u1eddi \u1edf m\u1ed7i nh\u00f3m<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ee9 nh\u1ea5t 4<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ee9 hai 6<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ee9 ba 8<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ee9 t\u01b0 12<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1eddi gi\u1ea3i:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1eddi gi\u1ea3i b\u00e0i 114 (trang 45 SGK To\u00e1n 6: \u01af\u1edbc v\u00e0 b\u1ed9i)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta c\u00f3 b\u1ea3ng sau:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch chia S\u1ed1 nh\u00f3m S\u1ed1 ng\u01b0\u1eddi \u1edf m\u1ed7i nh\u00f3m<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ee9 nh\u1ea5t 4 9<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ee9 hai 6 6<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ee9 ba 8 kh\u00f4ng th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ee9 t\u01b0 12 3<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp \u01b0\u1edbc v\u00e0 b\u1ed9i l\u1edbp 6 n\u00e2ng cao<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec1 b\u00e0i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 1. B\u1ed5 sung m\u1ed9t trong c\u00e1c c\u1ee5m t\u1eeb \u201c\u01b0\u1edbc c\u1ee7a\u2026\u201d, \u201cb\u1ed9i c\u1ee7a\u2026\u201d v\u00e0o ch\u1ed7 tr\u1ed1ng c\u1ee7a c\u00e1c c\u00e2u sau sao cho \u0111\u00fang:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1edbp 6A x\u1ebfp h\u00e0ng 4 kh\u00f4ng c\u00f3 ai l\u1ebb h\u00e0ng. S\u1ed1 <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> l\u1edbp l\u00e0 \u2026.<\/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> c\u1ee7a m\u1ed9t kh\u1ed1i x\u1ebfp h\u00e0ng 4 , h\u00e0ng 5, h\u00e0ng 7 \u0111\u1ec1u v\u1eeba \u0111\u1ee7. S\u1ed1 <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> c\u1ee7a kh\u1ed1i l\u00e0 \u2026.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e1p \u00e1n: B\u1ed9i c\u1ee7a 4, b\u1ed9i c\u1ee7a 5, b\u1ed9i c\u1ee7a 7.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ed5 4 c\u00f3 10 <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> \u0111\u01b0\u1ee3c chia \u0111\u1ec1u v\u00e0o c\u00e1c nh\u00f3m. S\u1ed1 nh\u00f3m l\u00e0 \u2026.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">40 nam, 50 n\u1eef \u0111\u01b0\u1ee3c chia \u0111\u1ec1u v\u00e0o c\u00e1c nh\u00f3m. S\u1ed1 nh\u00f3m l\u00e0 \u2026<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 2. T\u00ecm c\u00e1c b\u1ed9i nh\u1ecf h\u01a1n 31 c\u1ee7a 6<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 3. T\u00ecm t\u1eadp h\u1ee3p \u01af(8)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ebft t\u1eadp h\u1ee3p c\u00e1c b\u1ed9i c\u1ee7a 4 nh\u1ecf h\u01a1n 30.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ecm c\u00e1c \u01b0\u1edbc c\u1ee7a 12.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 5. T\u00ecm c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean x m\u00e0 x B(9) v\u00e0 x &lt; 40<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1eddi gi\u1ea3i b\u00e0i t\u1eadp \u01b0\u1edbc v\u00e0 b\u1ed9i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 1:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1edbp 6A x\u1ebfp h\u00e0ng 4 kh\u00f4ng c\u00f3 ai l\u1ebb h\u00e0ng. S\u1ed1 <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> l\u1edbp l\u00e0 \u2026.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2192 \u0110\u00e1p \u00e1n: B\u1ed9i c\u1ee7a 4<\/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> c\u1ee7a m\u1ed9t kh\u1ed1i x\u1ebfp h\u00e0ng 4 , h\u00e0ng 5, h\u00e0ng 7 \u0111\u1ec1u v\u1eeba \u0111\u1ee7. S\u1ed1 <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> c\u1ee7a kh\u1ed1i l\u00e0 \u2026.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2192 \u0110\u00e1p \u00e1n: B\u1ed9i c\u1ee7a 4, b\u1ed9i c\u1ee7a 5, b\u1ed9i c\u1ee7a 7.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ed5 4 c\u00f3 10 h\u1ecdc sinh \u0111\u01b0\u1ee3c chia \u0111\u1ec1u v\u00e0o c\u00e1c nh\u00f3m. S\u1ed1 nh\u00f3m l\u00e0 \u2026.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2192 \u0110\u00e1p \u00e1n: \u01af\u1edbc c\u1ee7a 10.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">40 nam, 50 n\u1eef \u0111\u01b0\u1ee3c chia \u0111\u1ec1u v\u00e0o c\u00e1c nh\u00f3m. S\u1ed1 nh\u00f3m l\u00e0 \u2026<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2192 \u0110\u00e1p \u00e1n: \u01af\u1edbc c\u1ee7a 40, \u01af\u1edbc c\u1ee7a 50.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 2:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ta c\u00f3 b\u1ed9i c\u1ee7a 6 v\u00e0 nh\u1ecf h\u01a1n 31 g\u1ed3m nh\u1eefng s\u1ed1 sau:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B(6) = {0, 6, 12, 18, 24, 30}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1ea7n l\u01b0\u1ee3t chia 8 cho 1, 2, 3, 4, 5, 6, 7, 8 ta th\u1ea5y 8 ch\u1ec9 chia h\u1ebft cho 1, 2, 4, 8<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Do \u0111\u00f3:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u01af(8) = {1; 2; 4; 8}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 4:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eadp h\u1ee3p b\u1ed9i c\u1ee7a 4 nh\u1ecf h\u01a1n 30 l\u00e0 B4= { 0; 4; 8; 12; 16; 20; 24; 28}.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c \u01b0\u1edbc c\u1ee7a 12 l\u00e0 \u01af12= {1; 2; 3; 4; 6; 12}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 5:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean x B(9) m\u00e0 x &lt; 40 l\u00e0: 0, 9, 18, 27, 36.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eefng l\u01b0u \u00fd h\u1ecdc To\u00e1n 6: \u01af\u1edbc v\u00e0 b\u1ed9i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u g\u00ec gi\u00fap con h\u1ecdc gi\u1ecfi To\u00e1n 6: \u01af\u1edbc v\u00e0 b\u1ed9i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u01b0\u01a1ng tr\u00ecnh To\u00e1n ti\u1ec3u h\u1ecdc l\u00ean THCS l\u00e0 m\u1ed9t b\u01b0\u1edbc nh\u1ea3y l\u1edbn \u0111\u1ed1i v\u1edbi h\u1ecdc sinh. B\u1edfi c\u00e1c em v\u1eeba tr\u1ea3i qua s\u1ef1 thay \u0111\u1ed5i to\u00e0n di\u1ec7n v\u1ec1 m\u00f4i tr\u01b0\u1eddng, c\u00e1ch th\u1ee9c gi\u1ea3ng d\u1ea1y, b\u1ea1n b\u00e8,\u2026 N\u1ebfu kh\u00f4ng nhanh ch\u00f3ng th\u00edch nghi v\u00e0 n\u1ed7 l\u1ef1c, \u0111\u00e2y th\u1ef1c s\u1ef1 l\u00e0 m\u1ed9t th\u00e1ch th\u1ee9c l\u1edbn v\u1edbi c\u00e1c em. M\u1ed9t s\u1ed1 l\u01b0u \u00fd h\u1ecdc To\u00e1n 6: \u01af\u1edbc v\u00e0 b\u1ed9i sau \u0111\u00e2y mong s\u1ebd gi\u00fap ph\u1ee5 huynh v\u00e0 c\u00e1c b\u1ea1n nh\u1ecf c\u00f3 nh\u1eefng b\u01b0\u1edbc \u0111i ch\u1eafc ch\u1eafn ngay t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u v\u00e0o THCS.<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>\u0110\u1ed1i v\u1edbi ph\u1ee5 huynh<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay t\u1eeb nh\u1eefng b\u00e0i To\u00e1n 6 \u0111\u1ea7u ti\u00ean \u0111\u00e3 t\u1ea1o nhi\u1ec1u kh\u00f3 kh\u0103n cho c\u00e1c con v\u1edbi c\u00e1c kh\u00e1i ni\u1ec7m, k\u00fd hi\u1ec7u m\u1edbi toanh, nh\u01b0: T\u1eadp h\u1ee3p, ph\u1ea7n t\u1eed, \u01b0\u1edbc v\u00e0 b\u1ed9i,\u2026 Tuy nhi\u00ean, \u0111\u00e2y l\u00e0 nh\u1eefng ki\u1ebfn th\u1ee9c n\u1ec1n t\u1ea3ng m\u00e0 c\u00e1c con kh\u00f4ng \u0111\u01b0\u1ee3c coi th\u01b0\u1eddng v\u00e0 d\u1ec5 d\u00e0ng h\u1ecdc qua loa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u1ee5 huynh c\u1ea7n ch\u00fa \u00fd, quan t\u00e2m, h\u1ecfi han v\u00e0 theo s\u00e1t qu\u00e1 tr\u00ecnh h\u1ecdc t\u1eadp c\u1ee7a con. Ki\u1ec3m tra t\u00ecnh h\u00ecnh h\u1ecdc th\u01b0\u1eddng xuy\u00ean gi\u00fap ba m\u1eb9 \u0111\u00e1nh gi\u00e1 ch\u00ednh x\u00e1c n\u0103ng l\u1ef1c h\u1ecdc c\u1ee7a con, t\u1eeb \u0111\u00f3 lu\u00f4n bi\u1ebft \u0111\u01b0\u1ee3c con y\u1ebfu \u1edf ph\u1ea7n ki\u1ebfn th\u1ee9c n\u00e0o v\u00e0 b\u1ed3i d\u01b0\u1ee1ng th\u00eam.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Y\u00eau c\u1ea7u con t\u00ecm hi\u1ec3u tr\u01b0\u1edbc b\u00e0i m\u1edbi t\u1ea1i nh\u00e0 \u0111\u1ec3 khi \u0111\u1ebfn l\u1edbp, con nhanh hi\u1ec3u b\u00e0i gi\u1ea3ng c\u1ee7a th\u1ea7y c\u00f4 tr\u00ean l\u1edbp lu\u00f4n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu c\u00f3 th\u1eddi gian, ph\u1ee5 huynh n\u00ean ch\u1ee7 \u0111\u1ed9ng c\u00f9ng h\u1ecdc v\u00e0 gi\u1ea3i c\u00e1c b\u00e0i to\u00e1n v\u1edbi tr\u1ebb. \u0110i\u1ec1u n\u00e0y l\u00e0m tr\u1ebb qu\u00ean \u0111i c\u1ea3m gi\u00e1c m\u1ed9t m\u00ecnh gi\u1ea3i quy\u1ebft c\u00e1c con s\u1ed1 v\u00e0 c\u00f4ng th\u1ee9c kh\u00f4 khan.<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\"><li>\u0110\u1ed1i v\u1edbi h\u1ecdc sinh<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Kho t\u00e0i li\u1ec7u h\u1ecdc t\u1eadp Mi\u1ec5n Ph\u00ed \u2013 Vietlearn<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 h\u1ecdc t\u1ed1t to\u00e1n 6, c\u00e1c em c\u1ea7n chu\u1ea9n b\u1ecb t\u1ed1t ki\u1ebfn th\u1ee9c to\u00e1n ti\u1ec3u h\u1ecdc. N\u1ebfu ki\u1ebfn th\u1ee9c b\u1ecb r\u1ed7ng t\u1eeb ti\u1ec3u h\u1ecdc, h\u1ecdc sinh c\u1ea7n b\u1ed5 sung l\u1ea1i ngay. B\u1edfi n\u1ebfu h\u1ecdc to\u00e1n trong t\u00ecnh tr\u1ea1ng m\u1ea5t g\u1ed1c th\u1ef1c s\u1ef1 kh\u00f3 kh\u0103n v\u00e0 kh\u00f4ng hi\u1ec3u \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1 ch\u00ednh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ea1n ch\u1ebf s\u1eed d\u1ee5ng s\u00e1ch gi\u1ea3i m\u1eabu b\u00e0i t\u1eadp \u01b0\u1edbc v\u00e0 b\u1ed9i n\u00e2ng cao. Vi\u1ec7c tham kh\u1ea3o s\u00e1ch gi\u1ea3i m\u1eabu b\u00e0i t\u1eadp nhi\u1ec1u s\u1ebd khi\u1ebfn n\u00e3o b\u1ed9 kh\u00f4ng r\u00e8n luy\u1ec7n \u0111\u01b0\u1ee3c kh\u1ea3 n\u0103ng t\u01b0 duy to\u00e1n h\u1ecdc v\u00e0 ng\u00e0y c\u00e0ng b\u1ecb l\u1ec7 thu\u1ed9c v\u00e0o c\u00e1ch gi\u1ea3i m\u1eabu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ecdc sinh THCS c\u00f3 th\u1ec3 l\u00e0m quen v\u1edbi c\u00e1ch s\u1eed d\u1ee5ng m\u00e1y t\u00ednh v\u00ec ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n l\u1edbp 6 cho ph\u00e9p s\u1eed d\u1ee5ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi nghe gi\u1ea3ng tr\u00ean l\u1edbp, n\u1ebfu c\u00f3 ph\u1ea7n ki\u1ebfn th\u1ee9c n\u00e0o ch\u01b0a hi\u1ec3u hay ch\u01b0a r\u00f5, c\u00e1c em c\u1ea7n ch\u1ee7 \u0111\u1ed9ng h\u1ecfi l\u1ea1i gi\u00e1o vi\u00ean ngay. Lu\u00f4n \u0111\u1ea3m b\u1ea3o nh\u1edb, hi\u1ec3u v\u00e0 n\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c n\u1ec1n t\u1ea3ng t\u1eeb l\u00fac b\u1eaft \u0111\u1ea7u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u0103ng \u0111\u1ed9ng gi\u1ea3i b\u00e0i to\u00e1n b\u1eb1ng nhi\u1ec1u c\u00e1ch th\u1ee9c v\u00e0 ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i kh\u00e1c nhau. Tuy nhi\u00ean, tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng gi\u1ea3i t\u1eaft. N\u00ean gi\u1ea3i c\u1ea9n th\u1eadn t\u1eebng b\u01b0\u1edbc m\u1ed9t \u0111\u1ec3 n\u1eafm v\u1eefng quy tr\u00ecnh gi\u1ea3i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c em c\u00f3 th\u1ec3 n\u00e2ng cao ki\u1ebfn th\u1ee9c v\u00e0 kh\u1ea3 n\u0103ng gi\u1ea3i b\u00e0i t\u1eadp qua c\u00e1c kh\u00f3a h\u1ecdc b\u1ed3i d\u01b0\u1ee1ng v\u00e0 n\u00e2ng cao. Kh\u00f3a h\u1ecdc gia s\u01b0 Online Vietlearn gi\u00fap c\u00e1c em d\u1ec5 d\u00e0ng n\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c m\u00f4n To\u00e1n l\u1edbp 6.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1edbi thi\u1ec7u Vietlearn Education<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vietlearn \u2013 Kh\u00f3a h\u1ecdc gia s\u01b0 To\u00e1n tr\u1ef1c tuy\u1ebfn h\u00e0ng \u0111\u1ea7u Vi\u1ec7t Nam<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vietlearn l\u00e0 c\u00f4ng ty Edtech v\u1ec1 gi\u00e1o d\u1ee5c tr\u1ef1c tuy\u1ebfn, cung c\u1ea5p tr\u1ea3i nghi\u1ec7m v\u00e0 b\u1ed3i d\u01b0\u1ee1ng h\u1ecdc t\u1eadp c\u00e1 nh\u00e2n cho h\u00e0ng tr\u0103m ngh\u00ecn h\u1ecdc sinh v\u00e0 nh\u00e0 tr\u01b0\u1eddng trong kh\u1ed1i ki\u1ebfn th\u1ee9c K-12 c\u1ee7a ch\u01b0\u01a1ng tr\u00ecnh gi\u00e1o d\u1ee5c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vietlearn kh\u00f4ng ch\u1ec9 l\u00e0 kh\u00f3a h\u1ecdc To\u00e1n, ch\u00fang t\u00f4i \u1ee9ng d\u1ee5ng v\u00e0 mang \u0111\u1ebfn tr\u1ea3i nghi\u1ec7m tri th\u1ee9c tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o (AI) v\u00e0 d\u1eef li\u1ec7u l\u1edbn (h\u00e0ng \u0111\u1ea7u \u0110\u00f4ng Nam \u00c1) \u0111\u1ebfn v\u1edbi c\u00e1c b\u1ea1n nh\u1ecf. Vietlearn mong mu\u1ed1n t\u1ea1o ra m\u00f4i tr\u01b0\u1eddng c\u00f4ng ngh\u1ec7 gi\u00fap c\u00e1c em ph\u00e1t huy \u0111i\u1ec3m m\u1ea1nh v\u00e0 say m\u00ea trong h\u1ecdc t\u1eadp.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ed3i d\u01b0\u1ee1ng, truy\u1ec1n c\u1ea3m h\u1ee9ng v\u00e0 truy\u1ec1n l\u1eeda h\u1ecdc t\u1eadp cho th\u1ebf h\u1ec7 tr\u1ebb lu\u00f4n l\u00e0 s\u1ee9 m\u1ec7nh c\u1ed1t l\u00f5i kh\u00f4ng thay \u0111\u1ed5i c\u1ee7a Vietlearn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00f4 h\u00ecnh gi\u00e1o d\u1ee5c v\u00e0 \u0111\u1ed9i ng\u0169 gi\u00e1o vi\u00ean c\u1ee7a Vietlearn \u0111\u01b0\u1ee3c nhi\u1ec1u t\u1ed5 ch\u1ee9c v\u00e0 c\u01a1 quan b\u00e1o ch\u00ed \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng h\u00e0ng \u0111\u1ea7u Vi\u1ec7t Nam.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00ean \u0111\u00e2y l\u00e0 ki\u1ebfn th\u1ee9c \u201c\u01af\u1edbc v\u00e0 b\u1ed9i l\u1edbp 6\u201d, hy v\u1ecdng \u0111\u00e3 gi\u00fap c\u00e1c b\u1ea1n nh\u1ecf hi\u1ec3u v\u00e0 ho\u00e0n th\u00e0nh t\u1ed1t c\u00e1c b\u00e0i t\u1eadp \u1edf tr\u00ean l\u1edbp v\u00e0 c\u1ee7a Vietlearn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 \u01af\u1edbc chung l\u1edbn nh\u1ea5t<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u01af\u1edbc chung v\u00e0 b\u1ed9i chung \u2013 N\u1eafm v\u1eefng To\u00e1n 6<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn Trong b\u00e0i tr\u01b0\u1edbc, ch\u00fang ta \u0111\u00e3 t\u00ecm hi\u1ec3u kh\u00e1 k\u1ef9 v\u1ec1 t\u00ednh ch\u1ea5t chia h\u1ebft c\u1ee7a m\u1ed9t t\u1ed5ng v\u00e0 c\u00e1c d\u1ea5u hi\u1ec7u chia h\u1ebft. Ng\u00e0y h\u00f4m nay, h\u00e3y h\u1ecdc c\u00e1ch t\u00ecm \u01b0\u1edbc v\u00e0 b\u1ed9i v\u00e0 l\u1eddi gi\u1ea3i b\u00e0i t\u1eadp s\u00e1ch gi\u00e1o khoa. L\u00fd thuy\u1ebft \u01af\u1edbc v\u00e0 b\u1ed9i Ph\u00e1t bi\u1ec3u: [&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":[1],"tags":[],"class_list":["post-2503","post","type-post","status-publish","format-standard","hentry","category-general"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/2503","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=2503"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/2503\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=2503"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=2503"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=2503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}