{"id":390016,"date":"2024-09-26T10:17:36","date_gmt":"2024-09-26T03:17:36","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=390016"},"modified":"2024-09-26T10:17:36","modified_gmt":"2024-09-26T03:17:36","slug":"thua-so-la-gi","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/thua-so-la-gi\/","title":{"rendered":"Th\u1eeba s\u1ed1 l\u00e0 g\u00ec? C\u00e1ch ph\u00e2n t\u00edch m\u1ed9t s\u1ed1 th\u00e0nh c\u00e1c th\u1eeba s\u1ed1"},"content":{"rendered":"

Th\u1eeba s\u1ed1 l\u00e0 kh\u00e1i ni\u1ec7m to\u00e1n h\u1ecdc d\u00f9ng \u0111\u1ec3 m\u00f4 t\u1ea3 bi\u1ec3u th\u1ee9c ho\u1eb7c c\u00e1c s\u1ed1 nh\u00e2n v\u1edbi nhau t\u1ea1o th\u00e0nh m\u1ed9t bi\u1ec3u th\u1ee9c ho\u1eb7c s\u1ed1 kh\u00e1c. Kh\u00e1i ni\u1ec7m n\u00e0y \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng gi\u00fap ch\u00fang ta hi\u1ec3u s\u00e2u v\u00e0 nhi\u1ec1u h\u01a1n v\u1ec1 c\u00e1c kh\u00eda c\u1ea1nh kh\u00e1c c\u1ee7a ph\u00e9p nh\u00e2n c\u0169ng nh\u01b0 \u1ee9ng d\u1ee5ng ph\u1ee9c t\u1ea1p c\u1ee7a n\u00f3 trong \u0111\u1ea1i s\u1ed1. Ch\u00ednh v\u00ec v\u1eady, Ho\u00e0ng H\u00e0 Mobile chia s\u1ebb \u0111\u1ebfn b\u1ea1n chi ti\u1ebft kh\u00e1i ni\u1ec7m th\u1eeba s\u1ed1 l\u00e0 g\u00ec v\u00e0 c\u00e1ch \u0111\u1ec3 ph\u00e2n t\u00edch m\u1ed9t s\u1ed1 b\u1ea5t k\u1ef3 th\u00e0nh c\u00e1c th\u1eeba s\u1ed1 trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y. Tham kh\u1ea3o nh\u00e9!\u00a0<\/span><\/p>\n

T\u00ecm hi\u1ec3u v\u1ec1 th\u1eeba s\u1ed1 l\u00e0 g\u00ec?<\/b><\/h2>\n

Th\u1eeba s\u1ed1 l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m to\u00e1n h\u1ecdc \u0111\u01b0\u1ee3c hi\u1ec3u r\u1eb1ng khi nh\u00e2n c\u00e1c s\u1ed1 l\u1ea1i v\u1edbi nhau s\u1ebd t\u1ea1o ra m\u1ed9t s\u1ed1 m\u1edbi g\u1ecdi l\u00e0 t\u00edch. Trong \u0111\u00f3, s\u1ed1 d\u00f9ng \u0111\u1ec3 nh\u00e2n l\u00e0 th\u1eeba s\u1ed1 v\u00e0 k\u1ebft qu\u1ea3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 t\u00edch (t\u00edch b\u1eb1ng v\u1edbi c\u00e1c s\u1ed1 tr\u01b0\u1edbc \u0111\u00f3).<\/span><\/p>\n

Th\u1ef1c t\u1ebf th\u00ec h\u1ea7u nh\u01b0 c\u00e1c s\u1ed1 \u0111\u1ec1u l\u00e0 t\u00edch c\u1ee7a nhi\u1ec1u th\u1eeba s\u1ed1 v\u00e0 t\u00f9y v\u00e0o t\u00ednh ch\u1ea5t ph\u00e9p to\u00e1n h\u1ecdc \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng m\u00e0 ng\u01b0\u1eddi ta g\u1ecdi t\u00ean ph\u00e9p to\u00e1n \u0111\u00f3 c\u0169ng nh\u01b0 c\u00e1c gi\u00e1 tr\u1ecb tham gia v\u00e0o.\u00a0<\/span><\/p>\n

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V\u00ed d\u1ee5: Th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh 2 x 6 = 12; s\u1ed1 2 v\u00e0 s\u1ed1 6 g\u1ecdi l\u00e0 c\u00e1c th\u1eeba s\u1ed1 v\u00e0 k\u1ebft qu\u1ea3 s\u1ed1 12 g\u1ecdi l\u00e0 t\u00edch.\u00a0<\/span><\/p>\n

Ngo\u00e0i nh\u1eefng gi\u00e1 tr\u1ecb m\u00e0 ch\u00fang ta c\u00f3 th\u1ec3 \u0111\u1ecdc th\u00ec nh\u1eefng s\u1ed1 n\u00e0y c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi t\u00ean d\u1ef1a tr\u00ean \u00fd ngh\u0129a c\u1ee7a ph\u00e9p to\u00e1n. T\u01b0\u01a1ng t\u1ef1 nh\u01b0 trong m\u1ed9t t\u1ed5ng, nh\u1eefng gi\u00e1 tr\u1ecb ch\u00ednh l\u00e0 s\u1ed1 h\u1ea1ng v\u00e0 trong m\u1ed9t hi\u1ec7u ch\u1ee9a s\u1ed1 b\u1ecb tr\u1eeb v\u00e0 s\u1ed1 tr\u1eeb. Ho\u1eb7c trong m\u1ed9t th\u01b0\u01a1ng s\u1ed1 s\u1ebd c\u00f3 s\u1ed1 b\u1ecb chia v\u00e0 s\u1ed1 chia.\u00a0<\/span><\/p>\n

Nh\u00ecn chung, vi\u1ec7c g\u1ecdi t\u00ean c\u00e1c con s\u1ed1 trong to\u00e1n h\u1ecdc gi\u00fap ch\u00fang ta c\u00f3 th\u1ec3 hi\u1ec3u th\u00eam ph\u1ea7n n\u00e0o v\u1ec1 \u00fd ngh\u0129a c\u1ee7a th\u1eeba s\u1ed1 v\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a th\u1eeba s\u1ed1 trong to\u00e1n h\u1ecdc.\u00a0<\/span><\/p>\n

T\u00ecm hi\u1ec3u v\u1ec1 th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1<\/b><\/h2>\n

Sau khi hi\u1ec3u v\u1ec1 th\u1eeba s\u1ed1 l\u00e0 g\u00ec th\u00ec th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 bi\u1ec3u th\u1ecb \u00fd ngh\u0129a r\u1eb1ng m\u1ed7i s\u1ed1 t\u1ef1 nhi\u00ean > 1 \u0111\u1ec1u c\u00f3 th\u1ec3 tr\u00ecnh b\u00e0y d\u01b0\u1edbi d\u1ea1ng t\u00edch c\u00e1c s\u1ed1 nguy\u00ean t\u1ed1. Nh\u1eefng s\u1ed1 nguy\u00ean t\u1ed1 \u0111\u00f3 c\u0169ng ch\u00ednh l\u00e0 th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 c\u1ee7a s\u1ed1 t\u1ef1 nhi\u00ean \u0111\u00f3.\u00a0<\/span><\/p>\n

Hi\u1ec3u c\u1ee5 th\u1ec3:<\/span><\/p>\n

S\u1ed1 nguy\u00ean t\u1ed1:<\/strong> L\u00e0 s\u1ed1 t\u1ef1 nhi\u00ean > 1, chia h\u1ebft cho 1 v\u00e0 ch\u00ednh m\u00ecnh. Ch\u1eb3ng h\u1ea1n, 3, 5, 7 l\u00e0 s\u1ed1 nguy\u00ean t\u1ed1 v\u00ec kh\u00f4ng chia \u0111\u01b0\u1ee3c h\u1ebft cho b\u1ea5t k\u1ef3 s\u1ed1 t\u1ef1 nhi\u00ean n\u00e0o ngo\u00e0i ch\u00ednh n\u00f3 v\u00e0 s\u1ed1 1.\u00a0<\/span><\/p>\n

Ph\u00e2n t\u00edch th\u1eeba s\u1ed1:<\/strong> B\u1ea5t k\u1ef3 s\u1ed1 t\u1ef1 nhi\u00ean n\u00e0o > 1 \u0111\u1ec1u ph\u00e2n t\u00edch \u0111\u01b0\u1ee3c th\u00e0nh th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1. \u1ede \u0111\u00e2y, vi\u1ec7c ph\u00e2n t\u00edch \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch t\u00e1ch m\u1ed9t s\u1ed1 th\u00e0nh nh\u1eefng s\u1ed1 nguy\u00ean t\u1ed1 nh\u1ecf h\u01a1n v\u00e0 c\u1ee9 l\u00e0m li\u00ean t\u1ee5c nh\u01b0 v\u1eady cho \u0111\u1ebfn khi ch\u1ec9 c\u00f2n l\u1ea1i c\u00e1c s\u1ed1 nguy\u00ean t\u1ed1.\u00a0<\/span><\/p>\n

Th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1<\/strong>: Nh\u1eefng s\u1ed1 nguy\u00ean t\u1ed1 thu \u0111\u01b0\u1ee3c trong qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch th\u1eeba s\u1ed1 ch\u00ednh l\u00e0 th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 c\u1ee7a s\u1ed1 d\u00f9ng \u0111\u1ec3 ph\u00e2n t\u00edch ban \u0111\u1ea7u.<\/span><\/p>\n

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V\u00ed d\u1ee5: Ph\u00e2n th\u1eeba s\u1ed1 c\u1ee7a s\u1ed1 48.\u00a0<\/span><\/p>\n