{"id":14286,"date":"2025-06-07T15:13:35","date_gmt":"2025-06-07T08:13:35","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=14286"},"modified":"2025-07-04T13:05:05","modified_gmt":"2025-07-04T06:05:05","slug":"chi-tiet-cach-nhan-biet-va-bai-tap-ve-dau-hieu-chia-het-cho-7","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/chi-tiet-cach-nhan-biet-va-bai-tap-ve-dau-hieu-chia-het-cho-7\/","title":{"rendered":"Chi ti\u1ebft c\u00e1ch nh\u1eadn bi\u1ebft v\u00e0 b\u00e0i t\u1eadp v\u1ec1 d\u1ea5u hi\u1ec7u chia h\u1ebft cho 7"},"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\/chi-tiet-cach-nhan-biet-va-bai-tap-ve-dau-hieu-chia-het-cho-7\/#Cac_cach_de_xac_dinh_cac_dau_hieu_chia_het_cho_7\" >C\u00e1c c\u00e1ch \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c d\u1ea5u hi\u1ec7u chia h\u1ebft cho 7<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/chi-tiet-cach-nhan-biet-va-bai-tap-ve-dau-hieu-chia-het-cho-7\/#Phuong_phap_1_Phuong_phap_cat\" >Ph\u01b0\u01a1ng ph\u00e1p 1: Ph\u01b0\u01a1ng ph\u00e1p c\u1eaft<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/chi-tiet-cach-nhan-biet-va-bai-tap-ve-dau-hieu-chia-het-cho-7\/#Phuong_phap_2_Nhan_va_bo_sung\" >Ph\u01b0\u01a1ng ph\u00e1p 2: Nh\u00e2n v\u00e0 b\u1ed5 sung<\/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\/chi-tiet-cach-nhan-biet-va-bai-tap-ve-dau-hieu-chia-het-cho-7\/#Phuong_phap_3_Phuong_phap_nhan_va_tru\" >Ph\u01b0\u01a1ng ph\u00e1p 3: Ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n v\u00e0 tr\u1eeb<\/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\/chi-tiet-cach-nhan-biet-va-bai-tap-ve-dau-hieu-chia-het-cho-7\/#Phuong_phap_4_Doi_voi_cac_so_chu_so_6\" >Ph\u01b0\u01a1ng ph\u00e1p 4: \u0110\u1ed1i v\u1edbi c\u00e1c s\u1ed1 ch\u1eef s\u1ed1 6<\/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\/chi-tiet-cach-nhan-biet-va-bai-tap-ve-dau-hieu-chia-het-cho-7\/#Cac_loai_van_de_ve_cac_dau_hieu_chia_het_cho_7\" >C\u00e1c lo\u1ea1i v\u1ea5n \u0111\u1ec1 v\u1ec1 c\u00e1c d\u1ea5u hi\u1ec7u chia h\u1ebft cho 7<\/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\/chi-tiet-cach-nhan-biet-va-bai-tap-ve-dau-hieu-chia-het-cho-7\/#Mau_1_Tim_so_tu_nhien_de_thoa_man_dau_hieu_chia_het_cho_7\" >M\u1eabu 1: T\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean \u0111\u1ec3 th\u1ecfa m\u00e3n d\u1ea5u hi\u1ec7u chia h\u1ebft cho 7<\/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\/chi-tiet-cach-nhan-biet-va-bai-tap-ve-dau-hieu-chia-het-cho-7\/#Mau_2_Chung_minh_rang_mot_so_hoac_mot_bieu_thuc_la_chia_hetkhong_chia_het_cho_7\" >M\u1eabu 2: Ch\u1ee9ng minh r\u1eb1ng m\u1ed9t s\u1ed1 ho\u1eb7c m\u1ed9t bi\u1ec3u th\u1ee9c l\u00e0 chia h\u1ebft\/kh\u00f4ng chia h\u1ebft cho 7<\/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\/chi-tiet-cach-nhan-biet-va-bai-tap-ve-dau-hieu-chia-het-cho-7\/#Tom_tat_cac_bai_tap_ve_cac_dau_hieu_phan_chia_cho_7_voi_cau_tra_loi\" >T\u00f3m t\u1eaft c\u00e1c b\u00e0i t\u1eadp v\u1ec1 c\u00e1c d\u1ea5u hi\u1ec7u ph\u00e2n chia cho 7 (v\u1edbi c\u00e2u tr\u1ea3 l\u1eddi)<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>Trong to\u00e1n h\u1ecdc, d\u1ea5u hi\u1ec7u b\u1ed9 ph\u1eadn l\u00e0 m\u1ed9t trong nh\u1eefng kh\u00e1i ni\u1ec7m quan tr\u1ecdng v\u00e0 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c v\u1ea5n \u0111\u1ec1 th\u1ef1c t\u1ebf. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 c\u00e1ch x\u00e1c \u0111\u1ecbnh c\u00e1c d\u1ea5u hi\u1ec7u ph\u00e2n chia cho 7 v\u1edbi m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp th\u00fa v\u1ecb. H\u00e3y kh\u00e1m ph\u00e1 v\u1edbi Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef ngay b\u00e2y gi\u1edd!<\/p>\n<p>                        Xem t\u1ea5t c\u1ea3<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_cach_de_xac_dinh_cac_dau_hieu_chia_het_cho_7\"><\/span>C\u00e1c c\u00e1ch \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c d\u1ea5u hi\u1ec7u chia h\u1ebft cho 7<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Trong b\u00e0i vi\u1ebft n\u00e0y, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef mu\u1ed1n gi\u1edbi thi\u1ec7u v\u1edbi b\u1ea1n 4 c\u00e1ch \u0111\u1ec3 bi\u1ebft c\u00e1c d\u1ea5u hi\u1ec7u k\u00fd cho 7 d\u1ec5 \u00e1p \u200b\u200bd\u1ee5ng nh\u1ea5t. Chi ti\u1ebft s\u1ebd \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y ngay d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Phuong_phap_1_Phuong_phap_cat\"><\/span>Ph\u01b0\u01a1ng ph\u00e1p 1: Ph\u01b0\u01a1ng ph\u00e1p c\u1eaft<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Quy t\u1eafc: \u0110\u1ec3 x\u00e1c \u0111\u1ecbnh m\u1ed9t s\u1ed1 c\u00f3 th\u1ec3 chia h\u1ebft cho 7, ch\u00fang t\u00f4i c\u1eaft s\u1ed1 cu\u1ed1i c\u00f9ng th\u00e0nh m\u1ed9t s\u1ed1, nh\u00e2n \u0111\u00f4i s\u1ed1 \u0111\u00f3 v\u00e0 nh\u1eadn s\u1ed1 \u0111\u00e3 \u0111\u01b0\u1ee3c gi\u1ea3m \u0111\u1ec3 tr\u1eeb c\u00e1c s\u1ed1 tr\u00f9ng l\u1eb7p. Ti\u1ebfp t\u1ee5c l\u1eb7p l\u1ea1i qu\u00e1 tr\u00ecnh n\u00e0y cho \u0111\u1ebfn khi thu \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia cho 7 (ch\u1eb3ng h\u1ea1n nh\u01b0 14, 7, 0, -7, v.v.). N\u1ebfu s\u1ed1 g\u1ed1c sau c\u00e1c b\u01b0\u1edbc tr\u00ean l\u00e0 chia h\u1ebft cho 7, th\u00ec s\u1ed1 \u0111\u00f3 c\u0169ng chia h\u1ebft cho 7.<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: S\u1ed1 3101 chia cho 7 ho\u1eb7c kh\u00f4ng?<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 1: Gi\u1ea3m s\u1ed1 1 cu\u1ed1i c\u00f9ng, 310.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 2: Nghi ng\u1edd s\u1ed1 1 (2 x 1 = 2) v\u00e0 ph\u1ea7n c\u00f2n l\u1ea1i sau khi c\u1eaft n\u00f3 ngo\u1ea1i tr\u1eeb n\u00f3: 310 &#8211; 2 = 308.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 3: Gi\u1ea3m ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng t\u1eeb 308 xu\u1ed1ng 8, 30.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 4: Nghi ng\u1edd s\u1ed1 8 (2 x 8 = 16) v\u00e0 ph\u1ea7n c\u00f2n l\u1ea1i sau khi c\u1eaft n\u00f3 ngo\u1ea1i tr\u1eeb n\u00f3: 30 &#8211; 16 = 14.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">V\u00ec v\u1eady, s\u1ed1 3101 chia h\u1ebft cho 7.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/1-dau-hieu-chia-het-cho-7.png\" alt=\"X\u00e1c \u0111\u1ecbnh c\u00e1c d\u1ea5u hi\u1ec7u ph\u00e2n chia cho 7. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Phuong_phap_2_Nhan_va_bo_sung\"><\/span>Ph\u01b0\u01a1ng ph\u00e1p 2: Nh\u00e2n v\u00e0 b\u1ed5 sung<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Quy t\u1eafc: L\u1ea5y ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean c\u1ee7a s\u1ed1 l\u01b0\u1ee3ng r\u1ec5 v\u1edbi 3, sau \u0111\u00f3 th\u00eam ch\u1eef s\u1ed1 ti\u1ebfp theo. Ti\u1ebfp t\u1ee5c g\u00e2y ra k\u1ebft qu\u1ea3 m\u1edbi v\u1edbi 3 v\u00e0 th\u00eam ch\u1eef s\u1ed1 ti\u1ebfp theo. L\u1eb7p l\u1ea1i qu\u00e1 tr\u00ecnh n\u00e0y cho \u0111\u1ebfn khi ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a s\u1ed1. N\u1ebfu k\u1ebft qu\u1ea3 cu\u1ed1i c\u00f9ng l\u00e0 chia h\u1ebft cho 7, th\u00ec con s\u1ed1 \u0111\u00f3 l\u00e0 chia h\u1ebft cho 7.<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: 203 chia h\u1ebft cho 7 hay kh\u00f4ng?<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 1: L\u1ea5y ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean c\u1ee7a 2, nh\u00e2n v\u1edbi 3, 6. C\u1ed9ng v\u1edbi ch\u1eef s\u1ed1 ti\u1ebfp theo l\u00e0 0, 6.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 2: L\u1ea5y k\u1ebft qu\u1ea3 m\u1edbi l\u00e0 6, nh\u00e2n v\u1edbi 3, nh\u1eadn 18. C\u1ed9ng v\u1edbi ch\u1eef s\u1ed1 ti\u1ebfp theo l\u00e0 3, 21.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">V\u00ec v\u1eady, s\u1ed1 203 l\u00e0 chia h\u1ebft cho 7.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/2-dau-hieu-chia-het-cho-7.png\" alt=\"X\u00e1c \u0111\u1ecbnh c\u00e1c d\u1ea5u hi\u1ec7u ph\u00e2n chia cho 7. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Phuong_phap_3_Phuong_phap_nhan_va_tru\"><\/span>Ph\u01b0\u01a1ng ph\u00e1p 3: Ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n v\u00e0 tr\u1eeb<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Quy t\u1eafc: L\u1ea5y ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean \u1edf b\u00ean ph\u1ea3i s\u1ed1 g\u1ed1c v\u1edbi 5, sau \u0111\u00f3 c\u1ed9ng v\u1edbi ch\u1eef s\u1ed1 th\u1ee9 hai v\u00e0 tr\u1eeb b\u1ed9i s\u1ed1 7. Ti\u1ebfp t\u1ee5c g\u00e2y ra k\u1ebft qu\u1ea3 m\u1edbi v\u1edbi 5, c\u1ed9ng v\u1edbi ch\u1eef s\u1ed1 ti\u1ebfp theo v\u00e0 kh\u1ea5u tr\u1eeb b\u1ed9i s\u1ed1 7. N\u1ebfu k\u1ebft qu\u1ea3 cu\u1ed1i c\u00f9ng l\u00e0 m\u1ed9t s\u1ed1 ph\u00e2n chia cho 7, th\u00ec con s\u1ed1 \u0111\u00f3 c\u00f3 th\u1ec3 chia h\u1ebft cho 7.<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: 2275 chia h\u1ebft cho 7?<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 1: L\u1ea5y ch\u1eef s\u1ed1 th\u1ee9 nh\u1ea5t \u1edf b\u00ean ph\u1ea3i 5, nh\u00e2n v\u1edbi 5, 25. C\u1ed9ng v\u1edbi ch\u1eef s\u1ed1 th\u1ee9 hai l\u00e0 7, 32. Tr\u1eeb b\u1ed9i s\u1ed1 7, 32 &#8211; 28 = 4.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 2: L\u1ea5y k\u1ebft qu\u1ea3 m\u1edbi c\u1ee7a 4, nh\u00e2n v\u1edbi 5, nh\u1eadn 20. C\u1ed9ng v\u1edbi ch\u1eef s\u1ed1 ti\u1ebfp theo l\u00e0 2, 22. Tr\u1eeb b\u1ed9i s\u1ed1 7, 22 &#8211; 21 = 1.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 3: L\u1ea5y k\u1ebft qu\u1ea3 m\u1edbi l\u00e0 1, nh\u00e2n v\u1edbi 5, nh\u1eadn 5. C\u1ed9ng v\u1edbi ch\u1eef s\u1ed1 ti\u1ebfp theo l\u00e0 2, 7. K\u1ebft qu\u1ea3 cu\u1ed1i c\u00f9ng ch\u00fang t\u00f4i nh\u1eadn \u0111\u01b0\u1ee3c 7 chia cho 7.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">V\u00ec v\u1eady, s\u1ed1 2275 l\u00e0 chia h\u1ebft cho 7.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/3-dau-hieu-chia-het-cho-7.png\" alt=\"X\u00e1c \u0111\u1ecbnh c\u00e1c d\u1ea5u hi\u1ec7u ph\u00e2n chia cho 7. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Phuong_phap_4_Doi_voi_cac_so_chu_so_6\"><\/span>Ph\u01b0\u01a1ng ph\u00e1p 4: \u0110\u1ed1i v\u1edbi c\u00e1c s\u1ed1 ch\u1eef s\u1ed1 6<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Quy t\u1eafc: Xem x\u00e9t 6 ch\u1eef s\u1ed1 kh\u00e1c nhau c\u1ee7a s\u1ed1 g\u1ed1c v\u00e0 ch\u00eanh l\u1ec7ch c\u1ee7a 3 s\u1ed1 \u0111\u1ea7u ti\u00ean tr\u1eeb 3 s\u1ed1 cu\u1ed1i c\u00f9ng. N\u1ebfu s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y l\u00e0 chia h\u1ebft cho 7, th\u00ec con s\u1ed1 \u0111\u00f3 l\u00e0 chia h\u1ebft cho 7.<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: 523152 chia h\u1ebft cho 7?<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 1: L\u1ea5y 3 s\u1ed1 \u0111\u1ea7u ti\u00ean (523) tr\u1eeb 3 s\u1ed1 cu\u1ed1i c\u00f9ng (152): 523 &#8211; 152 = 371.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 2: Th\u01b0\u01a1ng hi\u1ec7u n\u00e0y \u0111\u01b0\u1ee3c chia cho 7 (371 = 7 x 53).<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">V\u00ec v\u1eady, s\u1ed1 523152 l\u00e0 chia h\u1ebft cho 7.<\/p>\n<p dir=\"ltr\">\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_loai_van_de_ve_cac_dau_hieu_chia_het_cho_7\"><\/span>C\u00e1c lo\u1ea1i v\u1ea5n \u0111\u1ec1 v\u1ec1 c\u00e1c d\u1ea5u hi\u1ec7u chia h\u1ebft cho 7<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 chi ti\u1ebft v\u1ec1 2 lo\u1ea1i v\u1ea5n \u0111\u1ec1 v\u1ec1 c\u00e1c d\u1ea5u hi\u1ec7u ph\u00e2n chia cho 7 ph\u1ed5 bi\u1ebfn m\u00e0 b\u1ea1n n\u00ean nh\u1edb.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_1_Tim_so_tu_nhien_de_thoa_man_dau_hieu_chia_het_cho_7\"><\/span>M\u1eabu 1: T\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean \u0111\u1ec3 th\u1ecfa m\u00e3n d\u1ea5u hi\u1ec7u chia h\u1ebft cho 7<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">V\u00ed d\u1ee5: t\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean nh\u1ecf nh\u1ea5t v\u1edbi 4 ch\u1eef s\u1ed1 -ch\u1eef s\u1ed1 th\u1ecfa m\u00e3n d\u1ea5u hi\u1ec7u chia r\u1ebd c\u1ee7a 7.<\/p>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p: \u0110\u1ec3 t\u00ecm 4 s\u1ed1 t\u1ef1 nhi\u00ean D\u00e2n s\u1ed1 chia h\u1ebft cho 7, ch\u00fang ta c\u1ea7n th\u1eed t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 4 -\u0111\u1ecbnh ngh\u0129a \u0111\u1ec3 ki\u1ec3m tra. B\u1eaft \u0111\u1ea7u t\u1eeb 1000, ch\u00fang t\u00f4i ki\u1ec3m tra s\u1ed1 1000, 1001, 1002, &#8230; cho \u0111\u1ebfn khi b\u1ea1n t\u00ecm th\u1ea5y s\u1ed1 chia cho 7.<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 1000 kh\u00f4ng chia h\u1ebft cho 7 (1000 7 d\u01b0 6).<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 1001 c\u0169ng kh\u00f4ng chia cho 7 (1001 7 d\u01b0 5).<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ti\u1ebfp t\u1ee5c ki\u1ec3m tra cho \u0111\u1ebfn khi ch\u00fang t\u00f4i t\u00ecm th\u1ea5y 1003, v\u00ec 1003 \u0111\u01b0\u1ee3c chia cho 7 (1003 7 = 143).<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">V\u00ec v\u1eady, s\u1ed1 l\u01b0\u1ee3ng t\u1ef1 nhi\u00ean nh\u1ecf nh\u1ea5t v\u1edbi 4 -Digit l\u00e0 chia h\u1ebft cho 7 l\u00e0 1003.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/4-dau-hieu-chia-het-cho-7.png\" alt=\"X\u00e1c \u0111\u1ecbnh c\u00e1c d\u1ea5u hi\u1ec7u ph\u00e2n chia cho 7. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<table style=\"border-collapse: collapse;width: 100.01%;background-color: #fbeeb8\" border=\"1\">\n<tr>\n<td style=\"width: 98.5932%\">\n<p style=\"text-align: center\">\u0110\u1eebng b\u1ecf l\u1ee1 !!<\/p>\n<p style=\"text-align: center\">Ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n h\u1ecdc b\u1eb1ng ti\u1ebfng Anh, gi\u00fap ph\u00e1t tri\u1ec3n t\u01b0 duy theo c\u00e1ch to\u00e0n di\u1ec7n nh\u1ea5t.<\/p>\n<p style=\"text-align: center\">Nh\u1eadn t\u1ed1i \u0111a 40% \u01b0u \u0111\u00e3i ngay t\u1ea1i \u0111\u00e2y!<img decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/taimienphiMM.png\" width=\"185\"><\/p>\n<\/td>\n<\/tr>\n<\/table>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_2_Chung_minh_rang_mot_so_hoac_mot_bieu_thuc_la_chia_hetkhong_chia_het_cho_7\"><\/span>M\u1eabu 2: Ch\u1ee9ng minh r\u1eb1ng m\u1ed9t s\u1ed1 ho\u1eb7c m\u1ed9t bi\u1ec3u th\u1ee9c l\u00e0 chia h\u1ebft\/kh\u00f4ng chia h\u1ebft cho 7<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">V\u00ed d\u1ee5, ch\u1ee9ng minh r\u1eb1ng s\u1ed1 4842 kh\u00f4ng chia h\u1ebft cho 7.<\/p>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p: \u0110\u1ec3 ch\u1ee9ng minh r\u1eb1ng s\u1ed1 4842 kh\u00f4ng \u0111\u01b0\u1ee3c chia cho 7, ch\u00fang t\u00f4i th\u1ef1c hi\u1ec7n c\u00e1c b\u01b0\u1edbc sau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 1: S\u1ed1 ph\u00e2n t\u00edch 4842 th\u00e0nh c\u00e1c ch\u1eef s\u1ed1: 4842 = 4 x 1000 + 8 x 100 + 4 x 10 + 2.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 2: Ki\u1ec3m tra t\u1eebng ch\u1eef s\u1ed1: 4, 8, 4 v\u00e0 2. Ch\u00fang ta th\u1ea5y r\u1eb1ng t\u1ed5ng c\u1ee7a c\u00e1c ch\u1eef s\u1ed1 n\u00e0y l\u00e0 4 + 8 + 4 + 2 = 18.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 3: Ki\u1ec3m tra xem t\u1ed5ng c\u1ee7a c\u00e1c ch\u1eef s\u1ed1 chia h\u1ebft cho 7. Ch\u00fang ta th\u1ea5y s\u1ed1 ti\u1ec1n n\u00e0y kh\u00f4ng \u0111\u01b0\u1ee3c chia cho 7 (18 7 = 2 d\u01b0 l\u01b0\u1ee3ng 4).<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">V\u00ec v\u1eady, s\u1ed1 4842 kh\u00f4ng chia h\u1ebft cho 7.<\/p>\n<p dir=\"ltr\">Xem th\u00eam:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math &#8211; \u1ee8ng d\u1ee5ng to\u00e1n h\u1ecdc b\u1eb1ng ti\u1ebfng Anh s\u1ed1 1 cho tr\u1ebb m\u1eabu gi\u00e1o &amp; tr\u01b0\u1eddng ti\u1ec3u h\u1ecdc<\/p>\n<\/li>\n<li dir=\"ltr\">D\u1ea5u hi\u1ec7u chia h\u1ebft cho 5: Ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n + Gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i t\u1eadp s\u00e1ch gi\u00e1o khoa v\u00e0 b\u00e0i t\u1eadp b\u1ed5 sung<\/li>\n<\/ol>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Tom_tat_cac_bai_tap_ve_cac_dau_hieu_phan_chia_cho_7_voi_cau_tra_loi\"><\/span>T\u00f3m t\u1eaft c\u00e1c b\u00e0i t\u1eadp v\u1ec1 c\u00e1c d\u1ea5u hi\u1ec7u ph\u00e2n chia cho 7 (v\u1edbi c\u00e2u tr\u1ea3 l\u1eddi)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 1: Ki\u1ec3m tra xem s\u1ed1 252 c\u00f3 chia h\u1ebft cho 7 kh\u00f4ng?<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: S\u1ed1 252 chia h\u1ebft cho 7, v\u00ec 252 = 7 x 36.<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 2: T\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean nh\u1ecf nh\u1ea5t v\u1edbi 3 ch\u1eef s\u1ed1 chia h\u1ebft cho 7.<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: S\u1ed1 t\u1ef1 nhi\u00ean nh\u1ecf nh\u1ea5t v\u1edbi 3 ch\u1eef s\u1ed1 chia h\u1ebft cho 7 l\u00e0 105, v\u00ec 105 = 7 x 15.<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 3: Ch\u1ee9ng minh r\u1eb1ng s\u1ed1 2.016 chia h\u1ebft cho 7.<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: \u0110\u1ec3 ch\u1ee9ng minh s\u1ed1 2.016 chia h\u1ebft cho 7, ch\u00fang t\u00f4i th\u1ef1c hi\u1ec7n c\u00e1c b\u01b0\u1edbc sau:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ph\u00e2n t\u00edch S\u1ed1 2.016 th\u00e0nh c\u00e1c ch\u1eef s\u1ed1: 2.016 = 2 x 1000 + 0 x 100 + 1 x 10 + 6.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ki\u1ec3m tra t\u1eebng ch\u1eef s\u1ed1: 2, 0, 1 v\u00e0 6. Ch\u00fang ta th\u1ea5y r\u1eb1ng t\u1ed5ng c\u1ee7a c\u00e1c ch\u1eef s\u1ed1 n\u00e0y l\u00e0 2 + 0 + 1 + 6 = 9.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ki\u1ec3m tra xem t\u1ed5ng c\u1ee7a c\u00e1c ch\u1eef s\u1ed1 chia h\u1ebft cho 7. Ch\u00fang ta th\u1ea5y s\u1ed1 ti\u1ec1n n\u00e0y kh\u00f4ng chia h\u1ebft cho 7 (9 7 = 1 d\u01b0 2).<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">V\u00ec v\u1eady, s\u1ed1 2.016 kh\u00f4ng chia h\u1ebft cho 7.<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 4: T\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean nh\u1ecf nh\u1ea5t v\u1edbi 4 ch\u1eef s\u1ed1 chia h\u1ebft cho 7 v\u00e0 c\u00f3 h\u00e0ng tr\u0103m tr\u0103m 2.<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: S\u1ed1 t\u1ef1 nhi\u00ean nh\u1ecf nh\u1ea5t c\u00f3 4 ch\u1eef s\u1ed1 chia h\u1ebft cho 7 v\u00e0 h\u00e0ng tr\u0103m tr\u0103m l\u00e0 2 l\u00e0 203, v\u00ec 203 = 7 x 29.<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 5: T\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean l\u1edbn nh\u1ea5t v\u1edbi 5 ch\u1eef s\u1ed1 chia cho 7.<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: S\u1ed1 t\u1ef1 nhi\u00ean l\u1edbn nh\u1ea5t 5 -Tigit l\u00e0 chia h\u1ebft cho 7 99996, v\u00ec 99996 = 7 x 14284.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/5-dau-hieu-chia-het-cho-7.jpg\" alt=\"Shining Home - Gia \u0111\u00ecnh Anh Ng\u1eef Math - \u1ee8ng d\u1ee5ng to\u00e1n h\u1ecdc b\u1eb1ng ti\u1ebfng Anh s\u1ed1 1 cho tr\u1ebb m\u1eabu gi\u00e1o &amp; tr\u1ebb em ti\u1ec3u h\u1ecdc. (\u1ea2nh: Kh\u1ec9)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">Tr\u00ean \u0111\u00e2y l\u00e0 t\u1ea5t c\u1ea3 ki\u1ebfn \u200b\u200bth\u1ee9c v\u1ec1 c\u00e1c d\u1ea5u hi\u1ec7u k\u00fd t\u00ean c\u1ee7a 7 m\u00e0 Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef mu\u1ed1n chia s\u1ebb v\u1edbi b\u1ea1n. N\u1ebfu b\u1ea1n \u0111ang t\u00ecm ki\u1ebfm m\u1ed9t gi\u1ea3i ph\u00e1p t\u1ed1t cho to\u00e1n h\u1ecdc cho con b\u1ea1n, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn t\u1ed1t. V\u1edbi s\u1ed1 l\u01b0\u1ee3ng ki\u1ebfn \u200b\u200bth\u1ee9c \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp v\u00e0 x\u00e2y d\u1ef1ng d\u1ef1a tr\u00ean ch\u01b0\u01a1ng tr\u00ecnh ph\u1ed5 bi\u1ebfn m\u1edbi 2018, \u0111\u1ea3m b\u1ea3o r\u1eb1ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math s\u1ebd l\u00e0 m\u1ed9t tr\u1ee3 l\u00fd tuy\u1ec7t v\u1eddi tr\u00ean h\u00e0nh tr\u00ecnh chinh ph\u1ee5c to\u00e1n h\u1ecdc c\u1ee7a h\u1ecd.<\/p>\n<p>\u0110\u0103ng k\u00fd t\u00e0i kho\u1ea3n c\u1ee7a b\u1ea1n ngay t\u1ea1i \u0111\u00e2y \u0111\u1ec3 nh\u1eadn \u0111\u01b0\u1ee3c gi\u1ea3m gi\u00e1 t\u1edbi 40% v\u00e0 t\u00e0i li\u1ec7u h\u1ecdc t\u1eadp mi\u1ec5n ph\u00ed!<\/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>Trong to\u00e1n h\u1ecdc, d\u1ea5u hi\u1ec7u b\u1ed9 ph\u1eadn l\u00e0 m\u1ed9t trong nh\u1eefng kh\u00e1i ni\u1ec7m quan tr\u1ecdng v\u00e0 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c v\u1ea5n \u0111\u1ec1 th\u1ef1c t\u1ebf. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 c\u00e1ch x\u00e1c \u0111\u1ecbnh c\u00e1c d\u1ea5u hi\u1ec7u ph\u00e2n chia cho 7 v\u1edbi m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp th\u00fa v\u1ecb. H\u00e3y&#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-14286","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14286","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=14286"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14286\/revisions"}],"predecessor-version":[{"id":17395,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14286\/revisions\/17395"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=14286"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=14286"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=14286"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}