{"id":14266,"date":"2025-06-07T12:49:08","date_gmt":"2025-06-07T05:49:08","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=14266"},"modified":"2025-07-04T11:50:04","modified_gmt":"2025-07-04T04:50:04","slug":"dau-hieu-chia-het-cho-8-ly-thuyet-bai-tap-co-loi-giai","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/dau-hieu-chia-het-cho-8-ly-thuyet-bai-tap-co-loi-giai\/","title":{"rendered":"D\u1ea5u hi\u1ec7u chia h\u1ebft cho 8: L\u00fd thuy\u1ebft &amp; B\u00e0i t\u1eadp C\u00d3 L\u1edcI GI\u1ea2I"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ckconitsha.com\/vn\/dau-hieu-chia-het-cho-8-ly-thuyet-bai-tap-co-loi-giai\/#Cac_dau_hieu_chia_het_cho_8_can_nho\" >C\u00e1c d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8 c\u1ea7n nh\u1edb<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/dau-hieu-chia-het-cho-8-ly-thuyet-bai-tap-co-loi-giai\/#Cac_dang_bai_tap_dau_hieu_het_cho_8\" >C\u00e1c d\u1ea1ng b\u00e0i t\u1eadp d\u1ea5u hi\u1ec7u h\u1ebft cho 8<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/dau-hieu-chia-het-cho-8-ly-thuyet-bai-tap-co-loi-giai\/#Dang_1_Kiem_tra_1_so_co_chia_het_cho_8_khong\" >D\u1ea1ng 1: Ki\u1ec3m tra 1 s\u1ed1 c\u00f3 chia h\u1ebft cho 8 kh\u00f4ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/dau-hieu-chia-het-cho-8-ly-thuyet-bai-tap-co-loi-giai\/#Dang_2_Tu_cac_so_cho_truoc_thanh_lap_so_chia_het_cho_8\" >D\u1ea1ng 2: T\u1eeb c\u00e1c s\u1ed1 cho tr\u01b0\u1edbc th\u00e0nh l\u1eadp s\u1ed1 chia h\u1ebft cho 8<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/dau-hieu-chia-het-cho-8-ly-thuyet-bai-tap-co-loi-giai\/#Dang_3_Dien_so_thich_hop_de_tao_thanh_so_chia_het_cho_8\" >D\u1ea1ng 3: \u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p \u0111\u1ec3 t\u1ea1o th\u00e0nh s\u1ed1 chia h\u1ebft cho 8<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/dau-hieu-chia-het-cho-8-ly-thuyet-bai-tap-co-loi-giai\/#Bai_tap_dau_hieu_chia_het_cho_8_CO_LOI_GIAI\" >B\u00e0i t\u1eadp d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8 C\u00d3 L\u1edcI GI\u1ea2I<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/dau-hieu-chia-het-cho-8-ly-thuyet-bai-tap-co-loi-giai\/#Bai_tap_dau_hieu_chia_het_cho_8_theo_dang\" >B\u00e0i t\u1eadp d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8 theo d\u1ea1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ckconitsha.com\/vn\/dau-hieu-chia-het-cho-8-ly-thuyet-bai-tap-co-loi-giai\/#Loi_giai_Dap_an_bai_tap_dau_hieu_chia_het_cho_8\" >L\u1eddi gi\u1ea3i &amp; \u0110\u00e1p \u00e1n b\u00e0i t\u1eadp d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/dau-hieu-chia-het-cho-8-ly-thuyet-bai-tap-co-loi-giai\/#Bi_quyet_hoc_tot_kien_thuc_dau_hieu_chia_het_trong_mon_Toan\" >B\u00ed quy\u1ebft h\u1ecdc t\u1ed1t ki\u1ebfn th\u1ee9c d\u1ea5u hi\u1ec7u chia h\u1ebft trong m\u00f4n To\u00e1n\u00a0<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>L\u00e0 m\u1ed9t ph\u1ea7n ki\u1ebfn th\u1ee9c m\u1edf r\u1ed9ng trong d\u1ea5u hi\u1ec7u m\u1ed9t s\u1ed1 chia h\u1ebft cho m\u1ed9t s\u1ed1, d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8 th\u01b0\u1eddng kh\u00f4ng xu\u1ea5t hi\u1ec7n nhi\u1ec1u trong c\u00e1c b\u00e0i thi to\u00e1n. Tuy nhi\u00ean, \u0111\u1ec3 \u0111\u1ec3 c\u00f3 th\u1ec3 h\u1ecdc t\u1ed1t c\u00e1c ch\u01b0\u01a1ng c\u00f3 li\u00ean quan, ba m\u1eb9 n\u00ean c\u00f9ng con h\u1ecdc v\u00e0 th\u1ef1c h\u00e0nh b\u00e0i t\u1eadp c\u1ee7a ph\u1ea7n ki\u1ebfn th\u1ee9c n\u00e0y th\u1eadt th\u00e0nh th\u1ea1o.<\/p>\n<p>                        View all<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_dau_hieu_chia_het_cho_8_can_nho\"><\/span>C\u00e1c d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8 c\u1ea7n nh\u1edb<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\n<p dir=\"ltr\">C\u00f3 4 c\u00e1ch \u0111\u1ec3 nh\u1eadn bi\u1ebft m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean c\u00f3 chia h\u1ebft cho 8 hay kh\u00f4ng, bao g\u1ed3m:<\/p>\n<table style=\"border-collapse: collapse;background-color: #fff4f5;margin-left: auto;margin-right: auto;width: 100.034%\">\n<tr>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">C\u00e1c d\u1ea5u hi\u1ec7u<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">V\u00ed d\u1ee5<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p dir=\"ltr\">1. a. N\u1ebfu ch\u1eef s\u1ed1 h\u00e0ng tr\u0103m l\u00e0 ch\u1eb5n, th\u00ec s\u1ed1 t\u1ea1o th\u00e0nh b\u1edfi hai ch\u1eef s\u1ed1 sau c\u00f9ng ph\u1ea3i chia h\u1ebft cho 8.<\/p>\n<p dir=\"ltr\">b. N\u1ebfu ch\u1eef s\u1ed1 h\u00e0ng tr\u0103m l\u00e0 l\u1ebb, th\u00ec s\u1ed1 t\u1ea1o th\u00e0nh b\u1edfi hai ch\u1eef s\u1ed1 sau c\u00f9ng c\u1ed9ng th\u00eam 4 ph\u1ea3i \u0111\u01b0\u1ee3c s\u1ed1 chia h\u1ebft cho 8.<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">a. S\u1ed1 624 c\u00f3 ch\u1eef s\u1ed1 h\u00e0ng tr\u0103m l\u00e0 6 v\u00e0 l\u00e0 s\u1ed1 ch\u1eb5n<\/p>\n<p dir=\"ltr\">2 ch\u1eef s\u1ed1 sau c\u00f9ng l\u00e0 24 chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">=&gt; 624 chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">b. S\u1ed1 352 c\u00f3 ch\u1eef s\u1ed1 h\u00e0ng tr\u0103m l\u00e0 3 v\u00e0 l\u00e0 s\u1ed1 l\u1ebb<\/p>\n<p dir=\"ltr\">2 ch\u1eef s\u1ed1 sau c\u00f9ng l\u00e0 52, c\u1ed9ng 4 l\u00e0 56 &#8211; l\u00e0 s\u1ed1 chia h\u1ebft 8<\/p>\n<p dir=\"ltr\">=&gt; S\u1ed1 352 chia h\u1ebft cho 8.<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p dir=\"ltr\">2. C\u1ed9ng ch\u1eef s\u1ed1 sau c\u00f9ng v\u00e0o hai l\u1ea7n ph\u1ea7n c\u00f2n l\u1ea1i. Gi\u00e1 tr\u1ecb thu \u0111\u01b0\u1ee3c ph\u1ea3i l\u00e0 b\u1ed9i c\u1ee7a 8.<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">S\u1ed1 56 c\u00f3 ch\u1eef s\u1ed1 sau c\u00f9ng l\u00e0 6.<\/p>\n<p dir=\"ltr\">Ph\u1ea7n c\u00f2n l\u00e0 5<\/p>\n<p dir=\"ltr\">Ta c\u00f3: 6 + 5 x 2 = 16 l\u00e0 b\u1ed9i c\u1ee7a 8<\/p>\n<p dir=\"ltr\">=&gt; 56 chia h\u1ebft cho 8<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p dir=\"ltr\">3. Ba ch\u1eef s\u1ed1 sau c\u00f9ng t\u1ea1o th\u00e0nh s\u1ed1 chia h\u1ebft cho 8<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">1624. Ba ch\u1eef s\u1ed1 cu\u1ed1i l\u00e0 624.<\/p>\n<p dir=\"ltr\">Ta c\u00f3: 624 : 8 = 78 kh\u00f4ng d\u01b0<\/p>\n<p dir=\"ltr\">=&gt; 1624 chia h\u1ebft cho 8<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p dir=\"ltr\">4. C\u1ed9ng 4 l\u1ea7n ch\u1eef s\u1ed1 h\u00e0ng tr\u0103m v\u00e0o 2 l\u1ea7n ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c v\u00e0 1 l\u1ea7n ch\u1eef s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 ph\u1ea3i l\u00e0 b\u1ed9i c\u1ee7a 8.<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">S\u1ed1 34152<\/p>\n<p dir=\"ltr\">Ch\u1eef s\u1ed1 h\u00e0ng tr\u0103m l\u00e0 1<\/p>\n<p dir=\"ltr\">Ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c l\u00e0 5<\/p>\n<p dir=\"ltr\">Ch\u1eef s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb l\u00e0 2<\/p>\n<p dir=\"ltr\">Ta c\u00f3: 4 x 1 + 2 x 5 + 1 x 2 = 16 l\u00e0 b\u1ed9i c\u1ee7a 8<\/p>\n<p dir=\"ltr\">=&gt; 34152 chia h\u1ebft cho 8.<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_dang_bai_tap_dau_hieu_het_cho_8\"><\/span>C\u00e1c d\u1ea1ng b\u00e0i t\u1eadp d\u1ea5u hi\u1ec7u h\u1ebft cho 8<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">C\u00f3 x d\u1ea1ng b\u00e0i v\u1ec1 d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u00f4 t\u1ea3 v\u00e0 h\u01b0\u1edbng d\u1eabn ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i cho m\u1ed7i d\u1ea1ng b\u00e0i. B\u00e9 h\u00e3y \u0111\u1ecdc k\u1ef9 ph\u1ea7n ki\u1ebfn th\u1ee9c v\u00e0 v\u00ed d\u1ee5 m\u1eabu \u0111\u1ec3 n\u1eafm \u0111\u01b0\u1ee3c c\u00e1ch l\u00e0m \u0111\u00fang.<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dau-hieu-chia-het-cho-8-2.jpg\" alt=\"C\u00e1c d\u1ea1ng to\u00e1n v\u1ec1 d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8. (\u1ea2nh: Canva) \" width=\"800\" height=\"450\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_1_Kiem_tra_1_so_co_chia_het_cho_8_khong\"><\/span>D\u1ea1ng 1: Ki\u1ec3m tra 1 s\u1ed1 c\u00f3 chia h\u1ebft cho 8 kh\u00f4ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dau-hieu-chia-het-cho-8-3.jpg\" alt=\"D\u1ea1ng b\u00e0i ki\u1ec3m tra 1 s\u1ed1 c\u00f3 chia h\u1ebft cho 8 kh\u00f4ng. (\u1ea2nh: Canva)\" width=\"800\" height=\"450\"><\/p>\n<p dir=\"ltr\">\u0110\u1ec1 b\u00e0i: Ki\u1ec3m tra trong 1 d\u00e3y s\u1ed1 cho tr\u01b0\u1edbc nh\u1eefng s\u1ed1 n\u00e0o chia h\u1ebft cho 8, nh\u1eefng s\u1ed1 n\u00e0o kh\u00f4ng chia h\u1ebft cho 8.\u00a0<\/p>\n<p dir=\"ltr\">a. S\u1ed1 n\u00e0o chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">b. S\u1ed1 n\u00e0o kh\u00f4ng chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i:\u00a0<\/p>\n<table style=\"border-collapse: collapse;width: 100.034%;background-color: #fff4f5;margin-left: auto;margin-right: auto\" border=\"1\">\n<tr>\n<td style=\"width: 98.6181%\">C\u0103n c\u1ee9 v\u00e0o 1 trong 4 d\u1ea5u hi\u1ec7u k\u1ec3 tr\u00ean, th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh s\u1ed1 \u0111\u00f3 c\u00f3 chia h\u1ebft cho 8 hay kh\u00f4ng. L\u01b0u \u00fd: D\u1ea5u hi\u1ec7u 1, 3 v\u00e0 4 ch\u1ec9 \u00e1p d\u1ee5ng cho s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 tr\u1edf l\u00ean.<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">V\u00ed d\u1ee5: Cho d\u00e3y s\u1ed1 42, 48, 156; 336, 457 h\u00e3y x\u00e1c \u0111\u1ecbnh:<\/p>\n<p dir=\"ltr\">a. S\u1ed1 n\u00e0o chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">b. S\u1ed1 n\u00e0o kh\u00f4ng chia h\u1ebft cho 8\u00a0\u00a0<\/p>\n<p dir=\"ltr\">L\u1eddi gi\u1ea3i:<\/p>\n<p dir=\"ltr\">a. \u00c1p d\u1ee5ng d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8 s\u1ed1 2: C\u1ed9ng ch\u1eef s\u1ed1 sau c\u00f9ng v\u00e0o hai l\u1ea7n ph\u1ea7n c\u00f2n l\u1ea1i. Gi\u00e1 tr\u1ecb thu \u0111\u01b0\u1ee3c ph\u1ea3i l\u00e0 b\u1ed9i c\u1ee7a 8 (do 2 s\u1ed1 \u0111\u1ea7u kh\u00f4ng c\u00f3 ch\u1eef s\u1ed1 h\u00e0ng tr\u0103m), ta c\u00f3:<\/p>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fff4f5;margin-left: auto;margin-right: auto\">\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">42<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">2 + 2 x 4 = 10 kh\u00f4ng l\u00e0 b\u1ed9i c\u1ee7a 8<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">48<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">8 + 2 x 4 = 16 l\u00e0 b\u1ed9i c\u1ee7a 8<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">156<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">6 + 15 x 2 =36 kh\u00f4ng l\u00e0 b\u1ed9i c\u1ee7a 8<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">336<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">6 + 33 x 2 = 72 l\u00e0 b\u1ed9i c\u1ee7a 8<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">457<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">7 + 45 x 2 = 97 kh\u00f4ng l\u00e0 b\u1ed9i c\u1ee7a 8<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">V\u1eady c\u00e1c s\u1ed1 chia h\u1ebft cho 8 l\u00e0: 48 &amp; 336<\/p>\n<p dir=\"ltr\">b. D\u1ef1a v\u00e0o k\u1ebft qu\u1ea3 c\u00e2u a, c\u00e1c s\u1ed1 kh\u00f4ng chia h\u1ebft cho 8 l\u00e0 42; 156; 457<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_2_Tu_cac_so_cho_truoc_thanh_lap_so_chia_het_cho_8\"><\/span>D\u1ea1ng 2: T\u1eeb c\u00e1c s\u1ed1 cho tr\u01b0\u1edbc th\u00e0nh l\u1eadp s\u1ed1 chia h\u1ebft cho 8<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dau-hieu-chia-het-cho-8-4.jpg\" alt=\"D\u1ea1ng b\u00e0i t\u1eeb c\u00e1c ch\u1eef s\u1ed1 cho tr\u01b0\u1edbc, th\u00e0nh l\u1eadp s\u1ed1 chia h\u1ebft cho 8. (\u1ea2nh: Canva)\" width=\"800\" height=\"450\"><\/p>\n<p dir=\"ltr\">\u0110\u1ec1 b\u00e0i: Cho c\u00e1c s\u1ed1: 1, 2,3&#8230;. H\u00e3y vi\u1ebft c\u00e1c s\u1ed1 c\u00f3 (x) ch\u1eef s\u1ed1 chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i:\u00a0<\/p>\n<table style=\"border-collapse: collapse;width: 100.034%;background-color: #fff4f5\" border=\"1\">\n<tr>\n<td style=\"width: 98.6181%\">\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">N\u1ebfu x &gt; 4 ho\u1eb7c x = 4, \u00e1p d\u1ee5ng 1 trong 4 d\u1ea5u hi\u1ec7u.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">N\u1ebfu x &lt; 4, \u00e1p d\u1ee5ng d\u1ea5u hi\u1ec7u 1, 2.<\/p>\n<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">C\u00e1c b\u01b0\u1edbc gi\u1ea3i:<\/p>\n<p dir=\"ltr\">B\u01b0\u1edbc 1: G\u1ecdi s\u1ed1 c\u1ea7n l\u1eadp l\u00e0 ab, abc,&#8230; t\u00f9y theo y\u00eau c\u1ea7u s\u1ed1 ch\u1eef s\u1ed1 trong \u0111\u1ec1 b\u00e0i.<\/p>\n<p dir=\"ltr\">B\u01b0\u1edbc 2: \u00c1p d\u1ee5ng c\u00e1c d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8 \u0111\u1ec3 l\u1eadp s\u1ed1.<\/p>\n<p dir=\"ltr\">TH1: N\u1ebfu \u0111\u1ec1 b\u00e0i y\u00eau c\u1ea7u l\u1eadp s\u1ed1 c\u00f3 2 ch\u1eef s\u1ed1, b\u00e9 \u00e1p d\u1ee5ng d\u1ea5u hi\u1ec7u 2<\/p>\n<p dir=\"ltr\">Gi\u1ea3 s\u1eed s\u1ed1 c\u00f3 2 ch\u1eef s\u1ed1 l\u00e0 ab.<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng d\u1ea5u hi\u1ec7u 2, ta c\u00f3:<\/p>\n<p dir=\"ltr\">ab chia h\u1ebft cho 8 =&gt; (b + 2a) chia h\u1ebft cho 8 (c\u0169ng t\u1ee9c l\u00e0 b\u1ed9i c\u1ee7a 8)<\/p>\n<p dir=\"ltr\">N\u1ebfu a = \u2026. =&gt; b = \u2026. sao cho th\u1ecfa m\u00e3n \u0111i\u1ec1u ki\u1ec7n (b + 2a) chia h\u1ebft cho 8 =&gt; ab = \u2026 l\u00e0 s\u1ed1 chia h\u1ebft cho 8.<\/p>\n<p dir=\"ltr\">TH2: N\u1ebfu \u0111\u1ec1 b\u00e0i y\u00eau c\u1ea7u l\u1eadp s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1, b\u00e9 \u00e1p d\u1ee5ng d\u1ea5u hi\u1ec7u 1 ho\u1eb7c 2<\/p>\n<p dir=\"ltr\">Gi\u1ea3 s\u1eed s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 l\u00e0 abc.<\/p>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fff4f5;margin-left: auto;margin-right: auto\">\n<tr>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">C\u00e1c d\u1ea5u hi\u1ec7u<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">C\u00e1ch \u00e1p d\u1ee5ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">D\u1ea5u hi\u1ec7u 1<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">N\u1ebfu a ch\u1eb5n th\u00ec (bc) ph\u1ea3i chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">N\u1ebfu a l\u1ebb th\u00ec (bc + 4) ph\u1ea3i chia h\u1ebft cho 8<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">D\u1ea5u hi\u1ec7u 2<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">abc chia h\u1ebft cho 8 khi (c + 2 x ab) chia h\u1ebft cho 8<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">TH3: N\u1ebfu \u0111\u1ec1 b\u00e0i y\u00eau c\u1ea7u l\u1eadp s\u1ed1 c\u00f3 t\u1eeb 4 ch\u1eef s\u1ed1 tr\u1edf l\u00ean, \u00e1p d\u1ee5ng 1 trong 4 d\u1ea5u hi\u1ec7u<\/p>\n<p dir=\"ltr\">Gi\u1ea3 s\u1eed \u0111\u1ec1 b\u00e0i y\u00eau c\u1ea7u l\u1eadp s\u1ed1 c\u00f3 4 ch\u1eef s\u1ed1 th\u00ec s\u1ed1 \u0111\u00f3 c\u00f3 d\u1ea1ng: abcd.<\/p>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fff4f5;margin-left: auto;margin-right: auto\">\n<tr>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">C\u00e1c d\u1ea5u hi\u1ec7u<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">C\u00e1ch \u00e1p d\u1ee5ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">D\u1ea5u hi\u1ec7u 1<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">N\u1ebfu b ch\u1eb5n th\u00ec (cd) ph\u1ea3i chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">N\u1ebfu b l\u1ebb th\u00ec (cd + 4) ph\u1ea3i chia h\u1ebft cho 8<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">D\u1ea5u hi\u1ec7u 2<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">abc chia h\u1ebft cho 8 khi (d + 2 x abc) chia h\u1ebft cho 8<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">D\u1ea5u hi\u1ec7u 3<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">Th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh (bcd) chia cho 8, n\u1ebfu kh\u00f4ng d\u01b0 th\u00ec abcd chia h\u1ebft cho 8.<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">D\u1ea5u hi\u1ec7u 4<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">Th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh:\u00a0<\/p>\n<p dir=\"ltr\">(4 x b + 2 x c + d) chia h\u1ebft cho 8<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">V\u00ed d\u1ee5: Cho c\u00e1c s\u1ed1 2, 4, 6, 9. H\u00e3y l\u1eadp c\u00e1c s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">L\u1eddi gi\u1ea3i:<\/p>\n<p dir=\"ltr\">Gi\u1ea3 s\u1eed s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 l\u00e0 abc.<\/p>\n<p dir=\"ltr\">TH1: \u00c1p d\u1ee5ng d\u1ea5u hi\u1ec7u 1, ta c\u00f3:<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 2 l\u00e0 s\u1ed1 ch\u1eb5n =&gt; abc chia h\u1ebft cho 8 khi (bc) chia h\u1ebft cho 8.\u00a0<\/p>\n<p dir=\"ltr\">L\u1ea7n l\u01b0\u1ee3t thay b b\u1eb1ng c\u00e1c s\u1ed1 \u0111\u00e3 cho, ta c\u00f3:<\/p>\n<p dir=\"ltr\">b = 2 th\u00ec c = 4 =&gt; bc = 24 chia h\u1ebft cho 8 =&gt; abc = 224<\/p>\n<p dir=\"ltr\">b = 4 th\u00ec c kh\u00f4ng c\u00f3 gi\u00e1 tr\u1ecb th\u1ecfa m\u00e3n<\/p>\n<p dir=\"ltr\">b = 6 th\u00ec c = 4 =&gt; bc = 64 chia h\u1ebft cho 8 =&gt; abc = 264<\/p>\n<p dir=\"ltr\">b = 9 th\u00ec c = 6 =&gt; bc = 96 chia h\u1ebft cho 8 =&gt; abc = 296<\/p>\n<p dir=\"ltr\">Ta c\u00f3 c\u00e1c s\u1ed1 th\u1ecfa m\u00e3n l\u00e0: 224; 264; 296.<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 4 l\u00e0 s\u1ed1 ch\u1eb5n, l\u1ea7n l\u01b0\u1ee3t thay b b\u1eb1ng c\u00e1c s\u1ed1 \u0111\u00e3 cho ta c\u00f3 c\u00e1c s\u1ed1 th\u1ecfa m\u00e3n: 424; 464; 496<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 6 l\u00e0 s\u1ed1 ch\u1eb5n, l\u1ea7n l\u01b0\u1ee3t thay b b\u1eb1ng c\u00e1c s\u1ed1 \u0111\u00e3 cho ta c\u00f3 c\u00e1c s\u1ed1 th\u1ecfa m\u00e3n: 624; 664; 696<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 9 l\u00e0 s\u1ed1 l\u1ebb =&gt; abc chia h\u1ebft cho 8 khi (bc + 4) chia h\u1ebft cho 8.<\/p>\n<p dir=\"ltr\">L\u1ea7n l\u01b0\u1ee3t thay b b\u1eb1ng c\u00e1c s\u1ed1 \u0111\u00e3 cho, ta c\u00f3:<\/p>\n<p dir=\"ltr\">b = 2 =&gt; (2c + 4) chia h\u1ebft cho 8 =&gt; c kh\u00f4ng c\u00f3 gi\u00e1 tr\u1ecb n\u00e0o th\u1ecfa m\u00e3n<\/p>\n<p dir=\"ltr\">b = 4 =&gt; (4c + 4) chia h\u1ebft cho 8 =&gt; c = 4 =&gt; abc = 944<\/p>\n<p dir=\"ltr\">b = 6 =&gt; (6c + 4) chia h\u1ebft cho 8 =&gt; c = 9 =&gt; abc = 969<\/p>\n<p dir=\"ltr\">b = 9 =&gt; (9c + 4) chia h\u1ebft cho 8 =&gt; c = 2 =&gt; abc = 992<\/p>\n<p dir=\"ltr\">Ta c\u00f3 c\u00e1c s\u1ed1 th\u1ecfa m\u00e3n l\u00e0: 944; 969; 992.<\/p>\n<p dir=\"ltr\">V\u1eady c\u00e1c s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 chia h\u1ebft cho 8 g\u1ed3m: 224; 264; 296; 424; 464; 496; 624; 664; 696; 944; 969; 992.<\/p>\n<p dir=\"ltr\">TH2: \u00c1p d\u1ee5ng d\u1ea5u hi\u1ec7u 2<\/p>\n<p dir=\"ltr\">abc chia h\u1ebft cho 8 khi: (c + 2 x ab) chia h\u1ebft cho 8. L\u1ea7n l\u01b0\u1ee3t thay a, b, c b\u1eb1ng c\u00e1c s\u1ed1 \u0111\u00e3 cho, ta c\u00f3 b\u1ea3ng sau:<\/p>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fff4f5;margin-left: auto;margin-right: auto\">\n<tr>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">Gi\u00e1 tr\u1ecb c\u1ee7a c<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">Gi\u00e1 tr\u1ecb c\u1ee7a b<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">Gi\u00e1 tr\u1ecb c\u1ee7a a<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">Ph\u00e9p t\u00ednh<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">Chia h\u1ebft cho 8<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2 + 2 x 22 = 46\u00a0<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">4<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2 + 2 x 24 = 50<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">6<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2 + 2 x 26 = 54<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">9<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2 + 2 x 92 = 186<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">4<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2 + 2 x 24 = 50<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">4<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">4<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2 + 2 x 44 = 90<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">4<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">6<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2 + 2 x 64 = 130<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">4<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">9<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2 + 2 x 94 = 190<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">6<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2 + 2 x 26 = 54<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">6<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">4<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2 + 2 x 46 = 94<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">6<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">6<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2 + 2 x 66 = 134<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">6<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">9<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2 + 2 x 96 = 194<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">9<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2 + 2 x 29 = 60<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">9<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">4<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2 + 2 x 49 = 100<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">9<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">6<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2 + 2 x 69 = 140<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">9<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">9<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2 + 2 x 99 = 200<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">Kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng t\u01b0\u01a1ng t\u1ef1 v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb c = 4, c = 6 v\u00e0 c = 9, ta c\u00f3 k\u1ebft qu\u1ea3 nh\u01b0 \u00e1p d\u1ee5ng d\u1ea5u hi\u1ec7u 1.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_3_Dien_so_thich_hop_de_tao_thanh_so_chia_het_cho_8\"><\/span>D\u1ea1ng 3: \u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p \u0111\u1ec3 t\u1ea1o th\u00e0nh s\u1ed1 chia h\u1ebft cho 8<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dau-hieu-chia-het-cho-8-5.jpg\" alt=\"D\u1ea1ng b\u00e0i \u0111i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p t\u1ea1o th\u00e0nh s\u1ed1 chia h\u1ebft cho 8. (\u1ea2nh: Canva)\" width=\"800\" height=\"450\"><\/p>\n<p dir=\"ltr\">\u0110\u1ec1 b\u00e0i: Cho 1 s\u1ed1 t\u1ef1 nhi\u00ean g\u1ed3m 2 ph\u1ea7n: 1 ph\u1ea7n c\u00e1c ch\u1eef s\u1ed1 \u0111\u00e3 bi\u1ebft v\u00e0 1 ph\u1ea7n ch\u01b0a bi\u1ebft.<\/p>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i:\u00a0<\/p>\n<table style=\"border-collapse: collapse;width: 100.034%;background-color: #fff4f5;margin-left: auto;margin-right: auto\" border=\"1\">\n<tr>\n<td style=\"width: 98.6181%\">\u00c1p d\u1ee5ng 1 trong 4 d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8 \u0111\u1ec3 t\u00ecm \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb th\u1ecfa m\u00e3n. C\u00e1c s\u1ed1 c\u00f3 th\u1ec3 \u0111i\u1ec1n trong ph\u1ea1m vi t\u1eeb 0 &#8211; 9 ho\u1eb7c c\u00f3 gi\u1edbi h\u1ea1n t\u00f9y \u0111\u1ec1 b\u00e0i.<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">V\u00ed d\u1ee5: Cho s\u1ed1 35ab. H\u00e3y \u0111i\u1ec1n 2 ch\u1eef s\u1ed1 thay th\u1ebf a v\u00e0 b \u0111\u1ec3 t\u1ea1o th\u00e0nh s\u1ed1 chia h\u1ebft cho 8.<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng d\u1ea5u hi\u1ec7u 1:\u00a0<\/p>\n<p dir=\"ltr\">35ab c\u00f3 ch\u1eef s\u1ed1 h\u00e0ng tr\u0103m l\u00e0 5 v\u00e0 l\u00e0 s\u1ed1 l\u1ebb<\/p>\n<p dir=\"ltr\">=&gt; 35ab chia h\u1ebft cho 8 khi (ab + 4) chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 1 =&gt; (1b + 4) chia h\u1ebft cho 8 =&gt; b = 2 =&gt; ab = 12 =&gt; 35ab = 3512<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 2 =&gt; (2b + 4) chia h\u1ebft cho 8 =&gt; b = 0; 8 =&gt; ab = 20; 28 =&gt; 35ab = 3520; 3528<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 3 =&gt; (3b + 4) chia h\u1ebft cho 8 =&gt; b = 6 =&gt; ab = 36 =&gt; 35ab = 3536<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 4 =&gt; (4b + 4) chia h\u1ebft cho 8 =&gt; b = 4 =&gt; ab = 44 =&gt; 35ab = 3544<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 5 =&gt; (5b + 4) chia h\u1ebft cho 8 =&gt; b = 2 =&gt; ab = 52 =&gt; 35ab = 3552<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 6 =&gt; (6b + 4) chia h\u1ebft cho 8 =&gt; b = 0 =&gt; ab = 60 =&gt; 35ab = 3560<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 7 =&gt; (7b + 4) chia h\u1ebft cho 8 =&gt; b = 6 =&gt; ab = 76 =&gt; 35ab = 3576<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 8 =&gt; (8b + 4) chia h\u1ebft cho 8 =&gt; b = 4 =&gt; ab = 84 =&gt; 35ab = 3584<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 9 =&gt; (9b + 4) chia h\u1ebft cho 8 =&gt; b = 2 =&gt; ab = 92 =&gt; 35ab = 3592<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng d\u1ea5u hi\u1ec7u 2:<\/p>\n<p dir=\"ltr\">35ab chia h\u1ebft cho 8 khi: (b + 2 x 35a) chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 1 =&gt; (b + 2 x 351) = (b + 702) chia h\u1ebft cho 8 =&gt; b = 2<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 2 =&gt; (b + 2 x 352) = (b + 704) chia h\u1ebft cho 8 =&gt; b = 0; 8<\/p>\n<p dir=\"ltr\">Th\u1ef1c hi\u1ec7n t\u01b0\u01a1ng t\u1ef1 ta t\u00ecm \u0111\u01b0\u1ee3c c\u00e1c s\u1ed1 nh\u01b0 \u00e1p d\u1ee5ng d\u1ea5u hi\u1ec7u 1.<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng d\u1ea5u hi\u1ec7u 3:\u00a0<\/p>\n<p dir=\"ltr\">35ab chia h\u1ebft cho 8 khi: 5ab chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 1 =&gt; 51b chia h\u1ebft cho 8 khi b = 2 =&gt; 51b = 512 =&gt; 35ab = 3512<\/p>\n<p dir=\"ltr\">Th\u1ef1c hi\u1ec7n t\u01b0\u01a1ng t\u1ef1 ta t\u00ecm \u0111\u01b0\u1ee3c c\u00e1c s\u1ed1 nh\u01b0 \u00e1p d\u1ee5ng d\u1ea5u hi\u1ec7u 1.<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng d\u1ea5u hi\u1ec7u 4:\u00a0<\/p>\n<p dir=\"ltr\">35ab chia h\u1ebft cho 8 khi: (4 x 5 + 2 x a + b) chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">N\u1ebfu a = 1 =&gt; (4 x 5 + 2 x a + b) = (4 x 5 + 2 x 1 + b) = (22 + b) chia h\u1ebft cho 8 khi b = 2<\/p>\n<p dir=\"ltr\">=&gt; ab = 12 =&gt; 35ab = 3512.<\/p>\n<p dir=\"ltr\">Th\u1ef1c hi\u1ec7n t\u01b0\u01a1ng t\u1ef1 ta t\u00ecm \u0111\u01b0\u1ee3c c\u00e1c s\u1ed1 nh\u01b0 \u00e1p d\u1ee5ng d\u1ea5u hi\u1ec7u 1.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_dau_hieu_chia_het_cho_8_CO_LOI_GIAI\"><\/span>B\u00e0i t\u1eadp d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8 C\u00d3 L\u1edcI GI\u1ea2I<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Sau khi n\u1eafm \u0111\u01b0\u1ee3c c\u00e1c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n, ba m\u1eb9 h\u00e3y c\u00f9ng b\u00e9 l\u00e0m b\u00e0i t\u1eadp d\u01b0\u1edbi \u0111\u00e2y nh\u00e9!<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_dau_hieu_chia_het_cho_8_theo_dang\"><\/span>B\u00e0i t\u1eadp d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8 theo d\u1ea1ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">B\u00e0i 1: S\u1ed1 n\u00e0o chia h\u1ebft cho 8?<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dau-hieu-chia-het-cho-8-1.png\" alt=\"B\u00e0i t\u1eadp d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8. (\u1ea2nh: Internet) \" width=\"800\" height=\"1134\"><\/p>\n<p dir=\"ltr\">B\u00e0i 2: Cho d\u00e3y c\u00e1c s\u1ed1 38562; 71096; 9384; 2541; 6473; 5981, h\u00e3y x\u00e1c \u0111\u1ecbnh:<\/p>\n<p dir=\"ltr\">a. S\u1ed1 n\u00e0o chia h\u1ebft cho 8?<\/p>\n<p dir=\"ltr\">b. S\u1ed1 n\u00e0o kh\u00f4ng chia h\u1ebft cho 8?<\/p>\n<p dir=\"ltr\">B\u00e0i 3: Ch\u1ecdn 1 s\u1ed1 th\u00edch h\u1ee3p \u0111i\u1ec1n v\u00e0o ch\u1ed7 tr\u1ed1ng \u0111\u1ec3 t\u1ea1o th\u00e0nh s\u1ed1 chia h\u1ebft cho 8:<\/p>\n<p dir=\"ltr\">a. 856__\u00a0<\/p>\n<p dir=\"ltr\">b. 582__8<\/p>\n<p dir=\"ltr\">c. 43__56<\/p>\n<p dir=\"ltr\">d. 94__2<\/p>\n<p dir=\"ltr\">B\u00e0i 4: M\u1ed9t nh\u00e0 m\u00e1y s\u1ea3n xu\u1ea5t k\u1eb9o c\u00f3 26.936 vi\u00ean k\u1eb9o c\u1ea7n xu\u1ea5t x\u01b0\u1edfng 8 g\u00f3i. Li\u1ec7u sau khi qu\u00e1 tr\u00ecnh \u0111\u00f3ng g\u00f3i ho\u00e0n th\u00e0nh th\u00ec nh\u00e0 m\u00e1y c\u00f2n k\u1eb9o kh\u00f4ng?<\/p>\n<p dir=\"ltr\">B\u00e0i 5:\u00a0 N\u1ebfu Maria \u0111\u00f3ng g\u00f3i 8 qu\u1ea3 t\u00e1o trong m\u1ed9t t\u00fai, li\u1ec7u c\u00f4 \u1ea5y c\u00f3 th\u1ec3 \u0111\u00f3ng g\u00f3i 1.848 qu\u1ea3 t\u00e1o trong nh\u1eefng t\u00fai nh\u01b0 v\u1eady m\u00e0 kh\u00f4ng \u0111\u1ec3 s\u00f3t qu\u1ea3 t\u00e1o n\u00e0o kh\u00f4ng?<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Loi_giai_Dap_an_bai_tap_dau_hieu_chia_het_cho_8\"><\/span>L\u1eddi gi\u1ea3i &amp; \u0110\u00e1p \u00e1n b\u00e0i t\u1eadp d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dau-hieu-chia-het-cho-8-6.jpg\" alt=\"H\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8. (\u1ea2nh: Canva) \" width=\"800\" height=\"450\"><\/p>\n<p dir=\"ltr\">B\u00e0i 1:\u00a0<\/p>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fff4f5;margin-left: auto;margin-right: auto\">\n<tr>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">STT<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">S\u1ed1<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">S\u1ed1 chia h\u1ebft cho 8 kh\u00f4ng<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">STT<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">S\u1ed1<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">S\u1ed1 chia h\u1ebft cho 8 kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">1<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">40019<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">145729<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">3<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">80128<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">c\u00f3<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">4<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">42104<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">c\u00f3<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">5<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">24790<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">6<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">9985<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">7<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">308448<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">c\u00f3<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">8<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">6032<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">c\u00f3<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">9<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">531<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">10<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">72995<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">11<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">987936<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">c\u00f3<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">12<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">624<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">c\u00f3<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">13<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">11378<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">14<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">308725<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">15<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">734200<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">c\u00f3<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">16<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">256<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">c\u00f3<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">17<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">61473<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">kh\u00f4ng<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">18<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">8144<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">c\u00f3<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">B\u00e0i 2:\u00a0<\/p>\n<p dir=\"ltr\">a. \u00c1p d\u1ee5ng d\u1ea5u hi\u1ec7u 1, ta c\u00f3:<\/p>\n<p dir=\"ltr\">38562: S\u1ed1 h\u00e0ng tr\u0103m l\u1ebb, 62 + 4 = 66 kh\u00f4ng chia h\u1ebft cho 8 =&gt; 38562 kh\u00f4ng chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">71096: S\u1ed1 h\u00e0ng tr\u0103m ch\u1eb5n, 96 chia h\u1ebft cho 8 =&gt; 71096 chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">9384: S\u1ed1 h\u00e0ng tr\u0103m l\u1ebb, 84 + 4 = 88 chia h\u1ebft cho 8 =&gt; 9384 chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">2541: S\u1ed1 h\u00e0ng tr\u0103m l\u1ebb, 41 + 4 = 45 kh\u00f4ng chia h\u1ebft cho 8 =&gt; 2541 kh\u00f4ng chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">6473: S\u1ed1 h\u00e0ng tr\u0103m ch\u1eb5n, 73 kh\u00f4ng chia h\u1ebft cho 8 =&gt; 6473 kh\u00f4ng chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">5981: S\u1ed1 h\u00e0ng tr\u0103m l\u1ebb, 81 + 4 = 85 kh\u00f4ng chia h\u1ebft cho 8 =&gt; 5981 kh\u00f4ng chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">=&gt; C\u00e1c s\u1ed1 chia h\u1ebft cho 8 l\u00e0: 71096 &amp; 9384<\/p>\n<p dir=\"ltr\">b. T\u1eeb k\u1ebft qu\u1ea3 c\u00e2u a, c\u00e1c s\u1ed1 kh\u00f4ng chia h\u1ebft cho 8 l\u00e0: 38562; 2541; 6473; 5981<\/p>\n<p dir=\"ltr\">B\u00e0i 3:<\/p>\n<p dir=\"ltr\">a. 856__\u00a0<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng d\u1ea5u hi\u1ec7u 1, s\u1ed1 h\u00e0ng tr\u0103m l\u00e0 5 v\u00e0 l\u00e0 s\u1ed1 l\u1ebb<\/p>\n<p dir=\"ltr\">=&gt; 856__ chia h\u1ebft cho 8 khi (6__ + 4) chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">=&gt; S\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 0; 8<\/p>\n<p dir=\"ltr\">=&gt; S\u1ed1 chia h\u1ebft cho 8 l\u00e0 8560 &amp; 8568<\/p>\n<p dir=\"ltr\">b. 582__8<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng d\u1ea5u hi\u1ec7u 1, s\u1ed1 h\u00e0ng tr\u0103m ch\u1eb5n =&gt; __8 chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">=&gt; S\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0 4; 8<\/p>\n<p dir=\"ltr\">=&gt; S\u1ed1 chia h\u1ebft cho 8 l\u00e0 58248 &amp; 58288<\/p>\n<p dir=\"ltr\">c. 43__56<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng d\u1ea5u hi\u1ec7u 4, ta c\u00f3:\u00a0<\/p>\n<p dir=\"ltr\">(4 x __ + 2 x 5 + 6) chia h\u1ebft cho 8 =&gt; (4 x __ + 16) chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">N\u1ebfu __ = 1 =&gt; (4 x __ + 16) = (4 x 1 + 16) = 20 kh\u00f4ng chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">N\u1ebfu __ = 2 =&gt; (4 x __ + 16) = (4 x 2 + 16) = 24 chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">N\u1ebfu __ = 3 =&gt; (4 x __ + 16) = (4 x 3 + 16) = 28 kh\u00f4ng chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">N\u1ebfu __ = 4 =&gt; (4 x __ + 16) = (4 x 4 + 16) = 32 chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">N\u1ebfu __ = 5 =&gt; (4 x __ + 16) = (4 x 5 + 16) = 36 kh\u00f4ng chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">N\u1ebfu __ = 6 =&gt; (4 x __ + 16) = (4 x 6 + 16) = 40 chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">N\u1ebfu __ = 7 =&gt; (4 x __ + 16) = (4 x 7 + 16) = 44 kh\u00f4ng chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">N\u1ebfu __ = 8 =&gt; (4 x __ + 16) = (4 x 8 + 16) = 48 chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">N\u1ebfu __ = 9 =&gt; (4 x __ + 16) = (4 x 9 + 16) = 52 kh\u00f4ng chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">=&gt; S\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 2; 4; 6; 8<\/p>\n<p dir=\"ltr\">=&gt; S\u1ed1 chia h\u1ebft cho 8 l\u00e0: 43256; 43456; 43656; 43956.<\/p>\n<p dir=\"ltr\">d. 94__2<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng d\u1ea5u hi\u1ec7u 1, s\u1ed1 h\u00e0ng tr\u0103m ch\u1eb5n =&gt; __2 chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">=&gt; S\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 3; 7<\/p>\n<p dir=\"ltr\">=&gt; S\u1ed1 chia h\u1ebft cho 8 l\u00e0: 9432 &amp; 9472<\/p>\n<p dir=\"ltr\">B\u00e0i 4:<\/p>\n<p dir=\"ltr\">\u0110\u1ec3 sau khi qu\u00e1 tr\u00ecnh \u0111\u00f3ng g\u00f3i ho\u00e0n th\u00e0nh kh\u00f4ng c\u00f2n k\u1eb9o th\u00ec t\u1ed5ng s\u1ed1 k\u1eb9o ph\u1ea3i chia h\u1ebft cho 8, t\u1ee9c l\u00e0 26936 ph\u1ea3i chia h\u1ebft cho 8.<\/p>\n<p dir=\"ltr\">X\u00e9t s\u1ed1 26936 c\u00f3 s\u1ed1 h\u00e0ng tr\u0103m l\u00e0 l\u1ebb, 36 + 4 = 40 chia h\u1ebft cho 8 =&gt; 26936 chia h\u1ebft cho 8.<\/p>\n<p dir=\"ltr\">V\u1eady kh\u00f4ng c\u00f2n k\u1eb9o sau khi \u0111\u00f3ng g\u00f3i.<\/p>\n<p dir=\"ltr\">B\u00e0i 5:\u00a0<\/p>\n<p dir=\"ltr\">Maria c\u00f3 th\u1ec3 \u0111\u00f3ng \u0111\u01b0\u1ee3c s\u1ed1 t\u00e1o tr\u00ean m\u00e0 kh\u00f4ng s\u00f3t qu\u1ea3 n\u00e0o n\u1ebfu t\u1ed5ng s\u1ed1 t\u00e1o chia h\u1ebft cho 8.<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng d\u1ea5u hi\u1ec7u 1, s\u1ed1 1848 c\u00f3 s\u1ed1 h\u00e0ng tr\u0103m l\u00e0 ch\u1eb5n, 48 chia h\u1ebft cho 8\u00a0<\/p>\n<p dir=\"ltr\">=&gt; 1848 chia h\u1ebft cho 8<\/p>\n<p dir=\"ltr\">=&gt; Maria c\u00f3 th\u1ec3 s\u1eafp x\u1ebfp 8 qu\u1ea3 t\u00e1o v\u00e0o m\u1ed7i t\u00fai m\u00e0 kh\u00f4ng s\u00f3t qu\u1ea3 n\u00e0o.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bi_quyet_hoc_tot_kien_thuc_dau_hieu_chia_het_trong_mon_Toan\"><\/span>B\u00ed quy\u1ebft h\u1ecdc t\u1ed1t ki\u1ebfn th\u1ee9c d\u1ea5u hi\u1ec7u chia h\u1ebft trong m\u00f4n To\u00e1n\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">D\u1ea5u hi\u1ec7u chia h\u1ebft cho 8, cho 2,&#8230; l\u00e0 ph\u1ea7n ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n quan tr\u1ecdng gi\u00fap c\u00e1c con th\u1ef1c hi\u1ec7n ph\u00e9p nh\u00e2n, ph\u00e9p chia nhanh &amp; ch\u00ednh x\u00e1c. \u0110\u00e2y c\u0169ng l\u00e0 n\u1ec1n t\u1ea3ng \u0111\u1ec3 c\u00e1c con h\u1ecdc t\u1ed1t ph\u1ea7n Ph\u00e2n s\u1ed1 \u1edf ch\u01b0\u01a1ng sau. \u0110\u1ec3 ghi nh\u1edb c\u00e1c d\u1ea5u hi\u1ec7u n\u00e0y, ba m\u1eb9 c\u1ea7n \u00f4n t\u1eadp c\u00f9ng b\u00e9 v\u1edbi nh\u1eefng b\u00ed quy\u1ebft d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dau-hieu-chia-het-cho-8-7.jpg\" alt=\"B\u00ed quy\u1ebft h\u1ecdc t\u1ed1t ki\u1ebfn th\u1ee9c d\u1ea5u hi\u1ec7u chia h\u1ebft trong m\u00f4n To\u00e1n. (\u1ea2nh: Internet)\" width=\"800\" height=\"418\"><\/p>\n<p dir=\"ltr\">\u0110\u1ecdc k\u0129 ki\u1ebfn th\u1ee9c &amp; t\u1ef1 \u0111\u1eb7t v\u00ed d\u1ee5<\/p>\n<p dir=\"ltr\">Tr\u01b0\u1edbc khi l\u00e0m c\u00e1c b\u00e0i t\u1eadp Luy\u1ec7n t\u1eadp hay v\u1edf b\u00e0i t\u1eadp, c\u00e1c con c\u1ea7n \u0111\u1ecdc l\u1ea1i b\u00e0i gi\u1ea3ng trong S\u00e1ch gi\u00e1o khoa 1 &#8211; 2 l\u1ea7n \u0111\u1ec3 nh\u1edb l\u1ea1i b\u00e0i h\u1ecdc tr\u00ean l\u1edbp. Ti\u1ebfp \u0111\u1ebfn, v\u1edbi m\u1ed7i ph\u1ea7n ki\u1ebfn th\u1ee9c nh\u1ecf, con h\u00e3y t\u1ef1 \u0111\u1eb7t v\u00ed d\u1ee5 v\u00e0 gi\u1ea3i th\u00edch. Ph\u1ea7n n\u00e0y b\u00e9 c\u1ea7n ba m\u1eb9 \u0111\u1ed3ng h\u00e0nh \u0111\u1ec3 ki\u1ec3m tra \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n<p dir=\"ltr\">T\u1ef1 th\u1ef1c hi\u1ec7n b\u00e0i t\u1eadp m\u1ed9t m\u00ecnh<\/p>\n<p dir=\"ltr\">Sau khi \u0111\u00e3 n\u1eafm v\u1eefng c\u00e1c d\u1ea5u hi\u1ec7u chia h\u1ebft, con h\u00e3y t\u1ef1 ho\u00e0n th\u00e0nh b\u00e0i t\u1eadp m\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 h\u01b0\u1edbng d\u1eabn c\u1ee7a cha m\u1eb9. Qua ph\u1ea7n t\u1ef1 th\u1ef1c h\u00e0nh, ph\u1ee5 huynh c\u00f3 th\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 hi\u1ec3u b\u00e0i c\u1ee7a con.\u00a0<\/p>\n<p dir=\"ltr\">Ki\u1ec3m tra \u0111\u00fang sai v\u00e0 gi\u1ea3i th\u00edch chi ti\u1ebft<\/p>\n<p dir=\"ltr\">Sau khi con ho\u00e0n th\u00e0nh b\u00e0i t\u1eadp, ba m\u1eb9 h\u00e3y c\u00f9ng con ki\u1ec3m tra \u0111\u00fang sai. \u0110\u1ed1i v\u1edbi nh\u1eefng c\u00e2u \u0111\u00fang, ba m\u1eb9 c\u00f3 th\u1ec3 ch\u1ecdn 1 s\u1ed1 c\u00e2u b\u1ea5t k\u1ef3 \u0111\u1ec3 h\u1ecfi con c\u00e1ch gi\u1ea3i.\u00a0<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: V\u1edbi b\u00e0i t\u1eadp \u0111i\u1ec1n s\u1ed1 chia h\u1ebft cho 8, h\u00e3y h\u1ecfi v\u00ec sao con \u0111i\u1ec1n s\u1ed1 X (s\u1ed1 b\u00e9 \u0111\u00e3 \u0111i\u1ec1n)?<\/p>\n<p dir=\"ltr\">\u0110\u1ed1i v\u1edbi c\u00e1c c\u00e2u sai, h\u00e3y y\u00eau c\u1ea7u con ngh\u0129 th\u00eam v\u00e0 vi\u1ebft l\u1ea1i \u0111\u00e1p \u00e1n. N\u1ebfu con ch\u01b0a l\u00e0m \u0111\u00fang, h\u00e3y gi\u1ea3i th\u00edch k\u1ef9 v\u00e0 h\u01b0\u1edbng d\u1eabn con gi\u1ea3i v\u1edbi nh\u1ecbp \u0111i\u1ec7u ch\u1eadm \u0111\u1ec3 con d\u1ec5 ti\u1ebfp thu.<\/p>\n<p dir=\"ltr\">K\u1ebft h\u1ee3p c\u00e1c ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc to\u00e1n kh\u00e1c<\/p>\n<p dir=\"ltr\">Ngo\u00e0i h\u1ecdc qua s\u00e1ch v\u1edf, ph\u1ee5 huynh n\u00ean cho con th\u1eed ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc to\u00e1n m\u1edbi qua ch\u01b0\u01a1ng tr\u00ecnh h\u1ecdc To\u00e1n \u0111i\u1ec7n t\u1eed. M\u1ed9t trong s\u1ed1 c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh h\u1ecdc To\u00e1n chu\u1ea9n theo ch\u01b0\u01a1ng tr\u00ecnh c\u1ee7a B\u1ed9 Gi\u00e1o d\u1ee5c qua \u1ee9ng d\u1ee5ng tr\u00ean \u0111i\u1ec7n tho\u1ea1i ph\u1ed5 bi\u1ebfn hi\u1ec7n nay l\u00e0 Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math.\u00a0<\/p>\n<p dir=\"ltr\">C\u00e1c b\u00e0i h\u1ecdc tr\u00ean Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p theo c\u00e1c ch\u1ee7 \u0111\u1ec1: Ph\u00e9p c\u1ed9ng, ph\u00e9p tr\u1eeb, \u0111\u1ebfm s\u1ed1 t\u1eeb 1 &#8211; 10, t\u1eeb 10 &#8211; 100, 100 &#8211; 1000; ph\u00e9p nh\u00e2n chia; h\u00ecnh h\u1ecdc; \u0111o l\u01b0\u1eddng, th\u1eddi gian, ph\u00e9p t\u00ednh h\u1ec7 th\u1eadp ph\u00e2n, v.v\u2026. M\u1ed7i b\u00e0i g\u1ed3m ph\u1ea7n l\u00fd thuy\u1ebft k\u00e8m v\u00ed d\u1ee5 minh h\u1ecda, sau \u0111\u00f3 l\u00e0 chu\u1ed7i b\u00e0i t\u1eadp d\u1ea1ng ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u00e1c gi\u00fap con ghi nh\u1edb b\u00e0i hi\u1ec7u qu\u1ea3. Ch\u01b0\u01a1ng tr\u00ecnh c\u00f3 \u0111\u1ea7y \u0111\u1ee7 60+ ch\u1ee7 \u0111\u1ec1 to\u00e1n h\u1ecdc xuy\u00ean su\u1ed1t ch\u01b0\u01a1ng tr\u00ecnh Ti\u1ec3u h\u1ecdc h\u1ed7 tr\u1ee3 con \u0111\u1ea1t \u0111i\u1ec3m t\u1ed1t h\u01a1n tr\u00ean l\u1edbp.<\/p>\n<p dir=\"ltr\">T\u00ednh \u0111\u1ebfn nay, con s\u1ed1 ph\u1ee5 huynh h\u1ecdc sinh trong c\u1ed9ng \u0111\u1ed3ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef \u0111\u00e3 l\u00ean t\u1edbi h\u00e0ng tri\u1ec7u. \u0110\u00e2y l\u00e0 n\u01a1i ba m\u1eb9 \u0111\u01b0\u1ee3c h\u1ecdc h\u1ecfi v\u00e0 chia s\u1ebb ph\u01b0\u01a1ng ph\u00e1p d\u1ea1y con cho 3 m\u00f4n ch\u00ednh l\u00e0 To\u00e1n, V\u0103n, Anh. V\u00ec v\u1eady, tham gia c\u1ed9ng \u0111\u1ed3ng, ba m\u1eb9 c\u00f3 th\u1ec3 s\u1eb5n s\u00e0ng tr\u1edf th\u00e0nh gi\u00e1o vi\u00ean t\u1ea1i nh\u00e0 c\u1ee7a con b\u1ea5t c\u1ee9 l\u00fac n\u00e0o.\u00a0<\/p>\n<table style=\"border-collapse: collapse;width: 100.034%\" border=\"1\">\n<tr>\n<td style=\"width: 46.1587%;text-align: center;background-color: #ffffff;border-color: #ffffff\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/MM_tai-mien-phi-cho-ios.png\" alt=\"\" width=\"327\" height=\"64\"><\/td>\n<td style=\"width: 53.817%;text-align: center;background-color: #ffffff;border-color: #ffffff\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/MM_tai-mien-phi-cho-android.png\" alt=\"\" width=\"387\" height=\"64\"><\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">S\u1eed d\u1ee5ng s\u00e1ch b\u1ed5 tr\u1ee3 to\u00e1n h\u1ecdc<\/p>\n<p dir=\"ltr\">B\u00ean c\u1ea1nh h\u1ecdc l\u00fd thuy\u1ebft v\u00e0 luy\u1ec7n b\u00e0i t\u1eadp tr\u00ean SGK, VBT, ba m\u1eb9 c\u00f3 th\u1ec3 s\u01b0u t\u1ea7m th\u00eam 1 s\u1ed1 s\u00e1ch b\u00e0i t\u1eadp m\u1edf r\u1ed9ng, b\u00e0i t\u1eadp n\u00e2ng cao t\u00f9y theo tr\u00ecnh \u0111\u1ed9 c\u1ee7a con \u0111\u1ec3 h\u1ecdc th\u00eam. C\u00f9ng v\u1edbi \u0111\u00f3, n\u1ebfu ba m\u1eb9 \u0111\u0103ng k\u00fd h\u1ecdc To\u00e1n v\u1edbi Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math c\u0169ng s\u1ebd \u0111\u01b0\u1ee3c nh\u1eadn b\u1ed9 3 s\u00e1ch b\u00e0i t\u1eadp b\u1ed5 tr\u1ee3 k\u00e8m theo \u0111\u1ec3 b\u00e9 n\u00e2ng cao ki\u1ebfn th\u1ee9c c\u1ee7a m\u00ecnh.\u00a0<\/p>\n<p dir=\"ltr\">Gi\u1edbi thi\u1ec7u s\u00e1ch b\u1ed5 tr\u1ee3 &#8211; Workbook Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math:<\/p>\n<p dir=\"ltr\"><iframe loading=\"lazy\" title=\"MM | Sa\u0301ch ba\u0300i ta\u0323\u0302p\" width=\"1020\" height=\"574\" src=\"https:\/\/www.youtube.com\/embed\/9B35vU10DCI?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p dir=\"ltr\" style=\"line-height: 1.7999999999999998;margin-top: 0pt;margin-bottom: 0pt\">Qua b\u00e0i h\u1ecdc n\u00e0y, b\u00e9 \u0111\u00e3 n\u1eafm \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c v\u1ec1 d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8 v\u00e0 \u1ee9ng d\u1ee5ng t\u1ed1t trong c\u00e1c b\u00e0i t\u1eadp. H\u00e3y k\u1ebft h\u1ee3p vi\u1ec7c h\u1ecdc qua s\u00e1ch gi\u00e1o khoa v\u00e0 s\u00e1ch \u0111i\u1ec7n t\u1eed tr\u00ean \u0111i\u1ec7n tho\u1ea1i Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math \u0111\u1ec3 con t\u1ef1 n\u00e2ng cao ki\u1ebfn th\u1ee9c v\u00e0 \u0111\u1ea1t \u0111i\u1ec3m t\u1ed1t tr\u00ean l\u1edbp nh\u00e9!<\/p>\n<p>                                    \u00a0\u00a0T\u00e0i li\u1ec7u tham kh\u1ea3o<\/p>\n<p dir=\"ltr\">Divisibility Rule for 8 Worksheets &#8211; Ng\u00e0y truy c\u1eadp: 02\/08\/2023<\/p>\n<p>https:\/\/www.tutoringhour.com\/worksheets\/divisibility-rules\/for-8\/ <\/p>\n<p>Ngu\u1ed3n: <a href=\"https:\/\/www.ckconitsha.com\/vn\/\">https:\/\/www.ckconitsha.com\/vn\/<\/a> T\u00e1c gi\u1ea3: <a href=\"https:\/\/www.ckconitsha.com\/vn\/author\/nguyenlandung\">Nguy\u1ec5n L\u00e2n d\u0169ng<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>L\u00e0 m\u1ed9t ph\u1ea7n ki\u1ebfn th\u1ee9c m\u1edf r\u1ed9ng trong d\u1ea5u hi\u1ec7u m\u1ed9t s\u1ed1 chia h\u1ebft cho m\u1ed9t s\u1ed1, d\u1ea5u hi\u1ec7u chia h\u1ebft cho 8 th\u01b0\u1eddng kh\u00f4ng xu\u1ea5t hi\u1ec7n nhi\u1ec1u trong c\u00e1c b\u00e0i thi to\u00e1n. Tuy nhi\u00ean, \u0111\u1ec3 \u0111\u1ec3 c\u00f3 th\u1ec3 h\u1ecdc t\u1ed1t c\u00e1c ch\u01b0\u01a1ng c\u00f3 li\u00ean quan, ba m\u1eb9 n\u00ean c\u00f9ng con h\u1ecdc v\u00e0 th\u1ef1c h\u00e0nh&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-14266","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/comments?post=14266"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14266\/revisions"}],"predecessor-version":[{"id":17184,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14266\/revisions\/17184"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=14266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=14266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=14266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}