L\u00e0 t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 \u0111\u1ec1 chia h\u1ebft cho 3. C\u00f3 ngh\u0129a l\u00e0 s\u1ed1 d\u01b0 trong ph\u00e9p chia c\u1ee7a 1 s\u1ed1 b\u1ea5t k\u1ef3 trong d\u00e0n \u0111\u1ec1 n\u00e0y cho 3 \u0111\u1ec1u b\u1eb1ng 0.<\/p>\n\n\n\n
V\u00ed d\u1ee5:<\/strong><\/em><\/p>\n\n\n\n => Hai s\u1ed1 24 v\u00e0 64 thu\u1ed9c d\u00e0n \u0111\u1ec1 chia h\u1ebft cho 3<\/em><\/p>\n\n\n\n Tuy c\u00e1ch h\u00ecnh dung v\u1ec1 d\u00e0n \u0111\u1ec1 n\u00e0y kh\u00e1 \u0111\u01a1n gi\u1ea3n. \u0110\u1ec3 d\u1ec5 nh\u1edb v\u00e0 t\u00ednh to\u00e1n nhanh h\u01a1n ta th\u01b0\u1eddng \u00e1p d\u1ee5ng 1 d\u1ea5u hi\u1ec7u trong to\u00e1n h\u1ecdc. \u0110\u00f3 l\u00e0 c\u00e1c s\u1ed1 chia h\u1ebft cho 3 khi t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a n\u00f3 chia h\u1ebft cho 3. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y l\u00e0 c\u00e1c s\u1ed1 c\u00f3 t\u1ed5ng 2 ch\u1eef s\u1ed1 chia h\u1ebft cho 3 th\u00ec thu\u1ed9c d\u00e0n n\u00e0y.<\/p>\n\n\n\n V\u00ed d\u1ee5:<\/strong><\/em><\/p>\n\n\n\n => Hai s\u1ed1 87 v\u00e0 63 thu\u1ed9c d\u00e0n \u0111\u1ec1 chia h\u1ebft cho 3<\/em><\/p>\n\n\n\n D\u00e0n \u0111\u1ec1 n\u00e0y g\u1ed3m c\u00f3 34 s\u1ed1 d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n\n\n\n 00, 03, 06, 09,12,15,18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63, 66, 69, 72, 75, 78, 81, 84, 87, 90, 93, 96, 99<\/p>\n\n\n\n C\u0169ng nh\u01b0 d\u00e0n \u0111\u1ec1 chia h\u1ebft cho 3. Ta \u00e1p d\u1ee5ng d\u1ea5u hi\u1ec7u cho 3 d\u01b0 1 c\u1ee7a s\u1ed1 t\u1ef1 nhi\u00ean \u0111\u1ec3 nh\u1eadn bi\u1ebft c\u00e1c s\u1ed1 trong d\u00e0n \u0111\u1ec1 n\u00e0y. \u0110\u00f3 l\u00e0 c\u00e1c s\u1ed1 n\u00e0y chia cho 3 d\u01b0 1 khi t\u1ed5ng 2 ch\u1eef s\u1ed1 chia 3 d\u01b0 1.<\/p>\n\n\n\n V\u00ed d\u1ee5:<\/strong><\/em><\/p>\n\n\n\n => Hai s\u1ed1 64 v\u00e0 58 thu\u1ed9c d\u00e0n \u0111\u1ec1 chia 3 d\u01b0 1<\/em><\/p>\n\n\n\n D\u00e0n \u0111\u1ec1 chia 3 d\u01b0 2 c\u00f3 33 s\u1ed1 g\u1ed3m c\u00e1c s\u1ed1 sau:<\/p>\n\n\n\n 01, 04, 07, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37, 40, 43, 46, 49, 52, 55, 58, 61, 64, 67, 70, 73, 76, 79, 82, 85, 88, 91, 94, 97<\/p>\n\n\n\n D\u00e0n \u0111\u1ec1 chia cho 3 d\u01b0 2 c\u0169ng gi\u1ed1ng v\u1edbi hai d\u00e0n \u0111\u1ec1 ph\u00eda tr\u00ean \u1edf ph\u01b0\u01a1ng ph\u00e1p nh\u1eadn bi\u1ebft.<\/p>\n\n\n\n D\u00e0n \u0111\u1ec1 chia 3 d\u01b0 2 c\u00f3 33 s\u1ed1 g\u1ed3m c\u00e1c s\u1ed1 sau:<\/p>\n\n\n\n 02, 05, 08, 11, 14, 17, 20, 23, 26, 29, 32, 35, 38, 41, 44, 47, 50, 53, 56, 59, 62, 65, 68, 71, 74, 77, 80, 83, 86, 89, 92, 95, 98<\/p>\n\n\n\n Qua b\u00e0i vi\u1ebft n\u00e0y c\u00e1c b\u1ea1n ch\u1eafc ch\u1eafn \u0111\u00e3 n\u1eafm \u0111\u01b0\u1ee3c d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft nhanh c\u1ee7a d\u00e0n \u0111\u1ec1 chia h\u1ebft cho 3, d\u01b0 1, d\u01b0 2. Ch\u00fac c\u00e1c b\u1ea1n \u00e1p d\u1ee5ng th\u00e0nh c\u00f4ng nh\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y v\u00e0o th\u1ef1c t\u1ebf. H\u1eb9n g\u1eb7p l\u1ea1i c\u00e1c b\u1ea1n \u1edf nh\u1eefng b\u00e0i vi\u1ebft ti\u1ebfp theo.<\/p>\n\n\n\n D\u00e0n \u0111\u1ec1 kh\u00f4ng chia h\u1ebft cho 3 c\u00f3 66 s\u1ed1, l\u00e0 t\u1eadp h\u1ee3p c\u1ee7a d\u00e0n \u0111\u1ec1 chia 3 d\u01b0 1 v\u00e0 d\u00e0n \u0111\u1ec1 chia 3 d\u01b0 2.<\/p>\n\n\n\n 01, 04, 07, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37, 40, 43, 46, 49, 52, 55, 58, 61, 64, 67, 70, 73, 76, 79, 82, 85, 88, 91, 94, 97<\/p>\n\n\n\n 02, 05, 08, 11, 14, 17, 20, 23, 26, 29, 32, 35, 38, 41, 44, 47, 50, 53, 56, 59, 62, 65, 68, 71, 74, 77, 80, 83, 86, 89, 92, 95, 98<\/p>\n\n\n\n M\u1ed9t s\u1ed1 chia h\u1ebft cho 3 khi, s\u1ed1 \u0111\u00f3 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia h\u1ebft cho 3.<\/strong><\/p>\n\n\n\n V\u00ed d\u1ee5: S\u1ed1 42 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 4 + 2 = 6. Ta th\u1ea5y 6 : 3 = 2 v\u1eady 6 l\u00e0 s\u1ed1 chia h\u1ebft cho 3.<\/p>\n\n\n\n N\u00ean 42 l\u00e0 s\u1ed1 chia h\u1ebft cho 3.<\/p>\n\n\n D\u00e0n \u0111\u1ec1 chia h\u1ebft cho 3, d\u01b0 1, d\u01b0 2 v\u00e0 kh\u00f4ng chia h\u1ebft cho 3 m\u1edbi \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a v\u00e0 \u00e1p d\u1ee5ng g\u1ea7n \u0111\u00e2y. …. <\/p>\n","protected":false},"author":1,"featured_media":18165,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[313],"tags":[3167,3173,3174,3165,3177,3168,3166,3012,3175,3176,3008,3169,3011,3170,3004,460,3171,3172],"yoast_head":"\n\n
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D\u00c0N \u0110\u1ec0 CHIA CHO 3 D\u01af 1<\/strong><\/h2>\n\n\n\n
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![\"\"](\"\/wp-content\/uploads\/2024\/03\/3X5qZYG.jpg\")
<\/figure>\n\n\n\nD\u00c0N \u0110\u1ec0 CHIA CHO 3 D\u01af 2<\/strong><\/h2>\n\n\n\n
D\u00c0N \u0110\u1ec0 KH\u00d4NG CHIA H\u1ebeT CHO 3<\/strong><\/h2>\n\n\n\n
D\u1ea4U HI\u1ec6U CHIA H\u1ebeT CHO 3 L\u00c0 G\u00cc<\/strong><\/h2>\n\n\n\n
soi s\u1ed1 mi\u1ec1n b\u1eafc vip<\/h3>\n
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![\"\"](\"\/wp-content\/uploads\/2024\/09\/icon-click-2gif1515730014.gif\"){kind=icon}
b\u1ea1ch th\u1ee7 l\u00f4 mb si\u00eau v\u00edp<\/a><\/strong><\/li>\nb\u1ea1ch th\u1ee7 l\u00f4 2 nh\u00e1y mb si\u00eau v\u00edp<\/a><\/strong><\/li>\nsong th\u1ee7 l\u00f4 mb si\u00eau v\u00edp<\/a><\/strong><\/li>\nb\u1ea1ch th\u1ee7 l\u00f4 k\u00e9p mb vip<\/a><\/strong><\/li>\nsong th\u1ee7 l\u00f4 k\u00e9p mb v\u00edp<\/a><\/strong><\/li>\nb\u1ea1ch th\u1ee7 \u0111\u1ec1 mb si\u00eau v\u00edp<\/a><\/strong><\/li>\nsong th\u1ee7 \u0111\u1ec1 mb si\u00eau v\u00edp<\/a><\/strong><\/li>\nd\u00e0n \u0111\u1ec1 4 s\u1ed1 mb si\u00eau v\u00edp<\/a><\/strong><\/li>\nd\u00e0n \u0111\u1ec1 6 s\u1ed1 mb si\u00eau v\u00edp<\/a><\/strong><\/li>\nd\u00e0n \u0111\u1ec1 8 s\u1ed1 mb si\u00eau v\u00edp<\/a><\/strong><\/li>\nd\u00e0n \u0111\u1ec1 10 s\u1ed1 mb si\u00eau v\u00edp<\/a><\/strong><\/li>\nd\u00e0n l\u00f4 4 s\u1ed1 mb si\u00eau v\u00edp<\/a><\/strong><\/li>\nd\u00e0n l\u00f4 6 s\u1ed1 mb si\u00eau v\u00edp<\/a><\/strong><\/li>\nd\u00e0n l\u00f4 8 s\u1ed1 mb si\u00eau v\u00edp<\/a><\/strong><\/li>\nd\u00e0n l\u00f4 xi\u00ean 2 mb si\u00eau v\u00edp<\/a><\/strong><\/li>\nd\u00e0n l\u00f4 xi\u00ean 3 mb si\u00eau v\u00edp<\/a><\/strong><\/li>\nd\u00e0n l\u00f4 xi\u00ean 4 mb si\u00eau v\u00edp<\/a><\/strong><\/li>\n3 c\u00e0ng mi\u1ec1n b\u1eafc si\u00eau v\u00edp<\/a><\/strong><\/li>\n3 c\u00e0ng 2 s\u1ed1 mb si\u00eau v\u00edp<\/a><\/strong><\/li>\nd\u00e0n l\u00f4 10 s\u1ed1 mb si\u00eau v\u00edp<\/a><\/strong><\/li>\n\u0111\u1ec1 \u0111\u1ea7u \u0111u\u00f4i mb si\u00eau v\u00edp<\/a><\/strong><\/li>\n<\/ul>\n<\/div>\nsoi c\u1ea7u mi\u1ec1n nam<\/span><\/h3>\n
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x\u1ec9u ch\u1ee7 mn si\u00eau v\u00edp<\/a><\/strong><\/li>\ngi\u1ea3i \u0111\u1eb7c bi\u1ec7t mn si\u00eau vip<\/a><\/strong><\/li>\ngi\u1ea3i 8 mn si\u00eau v\u00edp \u0103n ngay<\/a><\/strong><\/li>\nbao l\u00f4 mn si\u00eau v\u00edp ph\u00e1t t\u00e0i<\/a><\/strong><\/li>\nc\u1eb7p x\u1ec9u ch\u1ee7 mn vip chu\u1ea9n x\u00e1c<\/a><\/strong><\/li>\nsong th\u1ee7 l\u00f4 mn vip ph\u00e1t t\u00e0i<\/a><\/strong><\/li>\n\u0111\u1ea7u \u0111u\u00f4i gi\u1ea3i 8 mn \u0103n to<\/a><\/strong><\/li>\n\u0111\u1ea7u \u0111u\u00f4i \u0111\u1eb7c bi\u1ec7t si\u00eau chu\u1ea9n<\/a><\/strong><\/li>\nl\u00f4 3 s\u1ed1 mn si\u00eau v\u00edp ph\u00e1t t\u00e0i<\/a><\/strong><\/li>\n<\/ul>\n<\/div>\nsoi c\u1ea7u mi\u1ec1n trung<\/span><\/h3>\n
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x\u1ec9u ch\u1ee7 mt si\u00eau v\u00edp<\/a><\/strong><\/li>\ngi\u1ea3i \u0111\u1eb7c bi\u1ec7t mt \u0103n ngay<\/a><\/strong><\/li>\ngi\u1ea3i 8 mt si\u00eau v\u00edp chu\u1ea9n x\u00e1c<\/a><\/strong><\/li>\nbao l\u00f4 mt si\u00eau v\u00edp ph\u00e1t t\u00e0i<\/a><\/strong><\/li>\nc\u1eb7p x\u1ec9u ch\u1ee7 mt vip \u0103n to<\/a><\/strong><\/li>\nsong th\u1ee7 l\u00f4 mt \u0103n l\u1edbn<\/a><\/strong><\/li>\n\u0111\u1ea7u \u0111u\u00f4i gi\u1ea3i 8 mt chu\u1ea9n x\u00e1c<\/a><\/strong><\/li>\n\u0111\u1ea7u \u0111u\u00f4i \u0111\u1eb7c bi\u1ec7t si\u00eau v\u00edp<\/a><\/strong><\/li>\nl\u00f4 3 s\u1ed1 mt si\u00eau v\u00edp<\/a><\/strong><\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"