{"id":9144,"date":"2025-09-09T04:29:26","date_gmt":"2025-09-09T04:29:26","guid":{"rendered":"https:\/\/tintuc.lifestruepurpose.org\/?p=9144"},"modified":"2025-09-09T04:29:26","modified_gmt":"2025-09-09T04:29:26","slug":"con-lam-toan-98-1088-bi-gach-sai-phu-huynh-tuc-gian-khi-xem-phep-tinh-cua-co-giao","status":"publish","type":"post","link":"https:\/\/tintuc.lifestruepurpose.org\/?p=9144","title":{"rendered":"Con l\u00e0m to\u00e1n “98-10=88” b\u1ecb g\u1ea1ch sai, ph\u1ee5 huynh t:\u1ee9c gi:\u1eadn khi xem ph\u00e9p t\u00ednh c\u1ee7a c\u00f4 gi\u00e1o"},"content":{"rendered":"

Nhi\u1ec1u ng\u01b0\u1eddi \u0111\u00e1nh gi\u00e1 l\u1ed7i sai c\u1ee7a c\u00f4 gi\u00e1o m\u1edbi l\u00e0 nghi\u00eam tr\u1ecdng.<\/h2>\n
<\/div>\n

Theo b\u00e1o Ph\u1ee5 n\u1eef Ph\u00e1p lu\u1eadt c\u00f3 b\u00e0i Con l\u00e0m to\u00e1n “98-10=88” b\u1ecb g\u1ea1ch sai, ph\u1ee5 huynh t\u1ee9c gi\u1eadn khi xem ph\u00e9p t\u00ednh c\u1ee7a c\u00f4 gi\u00e1o. N\u1ed9i dung nh\u01b0 sau:<\/strong><\/p>\n

Quan s\u00e1t v\u00e0 \u0111\u1ecdc k\u0129 b\u00e0i to\u00e1n l\u00e0 m\u1ed9t trong nh\u1eefng k\u1ef9 n\u0103ng c\u1ea7n thi\u1ebft, v\u00f4 c\u00f9ng quan tr\u1ecdng khi h\u1ecdc to\u00e1n. Ch\u00ednh v\u00ec th\u1ebf ph\u1ee5 huynh c\u1ea7n lu\u00f4n ph\u1ea3i nh\u1eafc nh\u1edf con em m\u00ecnh c\u1ea7n l\u00e0m \u0111i\u1ec1u \u0111\u00f3 tr\u01b0\u1edbc khi \u0111\u1eb7t b\u00fat l\u00e0m ph\u00e9p t\u00ednh \u0111\u1ec3 kh\u00f4ng x\u1ea3y ra nh\u1eefng sai l\u1ea7m \u0111\u00e1ng ti\u1ebfc nh\u01b0 em h\u1ecdc sinh d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n

C\u1ee5 th\u1ec3 m\u1ed9t ph\u1ee5 huynh chia s\u1ebb b\u00e0i l\u00e0m c\u1ee7a con m\u00ecnh tr\u00ean m\u1ed9t di\u1ec5n \u0111\u00e0n thu h\u00fat h\u00e0ng ngh\u00ecn l\u01b0\u1ee3t quan t\u00e2m t\u1eeb m\u1ecdi ng\u01b0\u1eddi, trong \u0111\u00f3 c\u00f3 r\u1ea5t nhi\u1ec1u c\u00e1c b\u1eadc ph\u1ee5 huynh kh\u00e1c c\u00f3 con c\u00f9ng \u0111\u1ed9 tu\u1ed5i h\u1ecdc l\u1edbp 2.<\/p>\n

B\u00e0i to\u00e1n ki\u1ec3m tra m\u00e0 c\u00f4 gi\u00e1o \u0111\u01b0a ra l\u00e0 \u201cT\u00ecm hi\u1ec7u c\u1ee7a s\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 hai ch\u1eef s\u1ed1 kh\u00e1c nhau v\u00e0 s\u1ed1 nh\u1ecf nh\u1ea5t c\u00f3 hai ch\u1eef s\u1ed1 gi\u1ed1ng nhau\u201d.<\/p>\n

Em h\u1ecdc sinh \u0111\u00e3 cho ra ph\u00e9p t\u00ednh tr\u1eeb, x\u00e1c \u0111\u1ecbnh “s\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 hai ch\u1eef s\u1ed1 kh\u00e1c nhau” l\u00e0 98 v\u00e0 “s\u1ed1 nh\u1ecf nh\u1ea5t c\u00f3 hai ch\u1eef s\u1ed1 gi\u1ed1ng nhau” l\u00e0 10.<\/p>\n

Ph\u00e9p t\u00ednh c\u1ee7a em h\u1ecdc sinh \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u01b0 sau:<\/p>\n

98 \u2013 10 = 88<\/p>\n

<\/div>\n

C\u00e1ch gi\u1ea3i c\u1ee7a c\u00f4 gi\u00e1o khi\u1ebfn ph\u1ee5 huynh c\u00e0ng hoang mang h\u01a1n.<\/p>\n

D\u1ec5 d\u00e0ng c\u00f3 th\u1ec3 nh\u1eadn th\u1ea5y ph\u00e9p t\u00ednh c\u1ee7a em h\u1ecdc sinh kh\u00f4ng h\u1ec1 sai nh\u01b0ng c\u00e1ch nh\u1eadn ra con s\u1ed1 ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u b\u00e0i to\u00e1n c\u1ee7a em h\u1ecdc sinh \u0111\u00e3 b\u1ecb sai. Theo \u0111\u00f3 em h\u1ecdc sinh t\u00ecm sai “s\u1ed1 nh\u1ecf nh\u1ea5t c\u00f3 hai ch\u1eef s\u1ed1 gi\u1ed1ng nhau”. Con s\u1ed1 ch\u00ednh x\u00e1c ph\u1ea3i l\u00e0 11 ch\u1ee9 kh\u00f4ng ph\u1ea3i 10 nh\u01b0 em h\u1ecdc sinh \u0111\u01b0a ra. Ch\u00ednh v\u00ec th\u1ebf ph\u00e9p t\u00ednh c\u1ee7a em \u0111\u00e3 b\u1ecb c\u00f4 gi\u00e1o g\u1ea1ch sai.<\/p>\n

Tuy nhi\u00ean c\u00e2u chuy\u00ean ch\u01b0a d\u1eebng l\u1ea1i \u1edf \u0111\u00f3 v\u00ec \u1edf ph\u00eda sau, c\u00f4 gi\u00e1o \u0111\u00e3 \u0111\u01b0a ra l\u1eddi gi\u1ea3i \u0111\u1ec3 gi\u00fap em h\u1ecdc sinh nh\u1eadn ra \u0111\u01b0\u1ee3c \u0111\u00e1p \u00e1n \u0111\u00fang. Th\u1ebf nh\u01b0ng kh\u00f4ng bi\u1ebft v\u00ec l\u00fd do g\u00ec m\u00e0 ph\u00e9p t\u00ednh c\u00f4 gi\u00e1o \u0111\u01b0a ra l\u1ea1i c\u0169ng kh\u00f4ng h\u1ec1 ch\u00ednh x\u00e1c nh\u01b0 c\u00f4 ngh\u0129.<\/p>\n

Theo \u0111\u00f3, c\u00f4 c\u0169ng nh\u1eadn \u0111\u1ecbnh sai “s\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 hai ch\u1eef s\u1ed1 kh\u00e1c nhau” l\u00e0 99. Ch\u00ednh x\u00e1c ph\u1ea3i l\u00e0 98.<\/p>\n

Tuy nhi\u00ean k\u1ebft qu\u1ea3 c\u1ee7a ph\u00e9p t\u00ednh c\u1ee7a c\u00f4 gi\u00e1o l\u1ea1i v\u1eabn \u0111\u00fang l\u1ea1i c\u00e0ng khi\u1ebfn c\u00e1c ph\u1ee5 huynh hoang mang h\u01a1n. C\u00f4 gi\u00e1o l\u00e0m: 99 \u2013 11 = 87<\/p>\n

Ph\u00eda d\u01b0\u1edbi ph\u1ea7n b\u00ecnh lu\u1eadn, nhi\u1ec1u ng\u01b0\u1eddi cho r\u1eb1ng c\u00f4 gi\u00e1o v\u1ed9i v\u00e0ng n\u00ean vi\u1ebft sai 98 th\u00e0nh 99 b\u1edfi th\u1ef1c ch\u1ea5t \u0111\u00e1p \u00e1n c\u1ee7a c\u00f4 v\u1eabn \u0111\u00fang.<\/p>\n

V\u1eady nh\u01b0ng r\u1ea5t nhi\u1ec1u ph\u1ee5 huynh v\u1eabn kh\u00f4ng h\u00e0i l\u00f2ng v\u1edbi c\u00e1ch l\u00e0m n\u00e0y c\u1ee7a c\u00f4 gi\u00e1o, \u0111i\u1ec1u \u0111\u00f3 ch\u1ee9ng t\u1ecf c\u00f4 c\u0169ng kh\u00f4ng c\u1ea9n th\u1eadn trong khi l\u00e0m to\u00e1n n\u00ean \u0111\u00e3 d\u1eabn \u0111\u1ebfn c\u00e1ch \u0111\u1eb7t ph\u00e9p t\u00ednh sai. Nh\u01b0 v\u1eady khi\u1ebfn cho h\u1ecdc sinh v\u1eeba kh\u00f3 hi\u1ec3u l\u1ea1i kh\u00f4ng c\u1ea9n th\u1eadn h\u01a1n trong vi\u1ec7c l\u00e0m to\u00e1n \u0111\u01b0\u1ee3c.<\/p>\n

\u201cKh\u00f4ng\u00a0\u0111\u1ecdc \u0111\u1ec1 th\u00ec ri\u00eang kho\u1ea3n c\u00f4 gi\u00e1o d\u00e1m vi\u1ebft 99 – 11= 87 l\u00e0 c\u00f4 n\u00ean xem x\u00e9t l\u1ea1i b\u1ea3n th\u00e2n r\u1ed3i, d\u1ea1y h\u1ecdc sinh m\u00e0 c\u00f2n nh\u1ea7m v\u1edbi\u00a0l\u1eabn \u0111\u01b0\u1ee3c\u00a0th\u00ec \u0111\u1eebng tr\u00e1ch sao h\u1ecdc sinh\u00a0n\u00f3 nh\u1ea7m. C\u00f2n \u0111\u1ec1 b\u00e0i th\u00ec h\u1ecdc sinh v\u1eabn sai. C\u1ea3 c\u00f4 v\u00e0 tr\u00f2 \u0111\u1ec1u sai\u201d \u2013 m\u1ed9t ph\u1ee5 huynh b\u00e0y t\u1ecf.<\/p>\n

<\/div>\n

\u1ea2nh minh h\u1ecda<\/p>\n

Nh\u01b0 th\u1ebf c\u00f3 th\u1ec3 th\u1ea5y khi l\u00e0m b\u1ea5t k\u00ec m\u1ed9t b\u00e0i to\u00e1n n\u00e0o c\u1ea7n r\u1ea5t nhi\u1ec1u k\u1ef9 n\u0103ng th\u00ec m\u1edbi \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 t\u1ed1i \u0111a nh\u1ea5t. Ch\u00ednh v\u00ec th\u1ebf, \u0111\u1ec3 tr\u00e1nh nh\u1eefng sai s\u00f3t th\u01b0\u1eddng g\u1eb7p nh\u1ea5t khi l\u00e0m to\u00e1n gi\u1ed1ng nh\u01b0 em h\u1ecdc sinh v\u00e0 c\u00f4 gi\u00e1o n\u00f3i tr\u00ean, c\u00e1c b\u1eadc ph\u1ee5 huynh c\u0169ng c\u1ea7n nh\u1eafc nh\u1edf k\u0129 c\u00e1c con th\u1ef1c hi\u1ec7n \u0111\u1ea7y \u0111\u1ee7 c\u00e1c b\u01b0\u1edbc sau khi l\u00e0m b\u1ea5t k\u00ec m\u1ed9t b\u00e0i to\u00e1n n\u00e0o:<\/p>\n

\u0110\u1ecdc k\u1ef9 \u0111\u1ec1 b\u00e0i:\u00a0<\/strong>H\u00e3y ch\u1eafc ch\u1eafn r\u1eb1ng con hi\u1ec3u r\u00f5 y\u00eau c\u1ea7u c\u1ee7a b\u00e0i to\u00e1n. \u0110\u1ecdc l\u1ea1i m\u1ed9t ho\u1eb7c hai l\u1ea7n \u0111\u1ec3 n\u1eafm b\u1eaft th\u00f4ng tin c\u1ea7n thi\u1ebft.<\/p>\n

X\u00e1c \u0111\u1ecbnh d\u1eef li\u1ec7u<\/strong>: Ghi ch\u00fa c\u00e1c s\u1ed1 li\u1ec7u, th\u00f4ng tin v\u00e0 \u0111i\u1ec1u ki\u1ec7n c\u00f3 trong \u0111\u1ec1 b\u00e0i. Vi\u1ec7c n\u00e0y gi\u00fap nh\u1eadn di\u1ec7n c\u00e1c y\u1ebfu t\u1ed1 quan tr\u1ecdng.<\/p>\n

L\u1eadp k\u1ebf ho\u1ea1ch gi\u1ea3i:<\/strong>\u00a0Suy ngh\u0129 v\u1ec1 ph\u01b0\u01a1ng ph\u00e1p v\u00e0 c\u00e1ch th\u1ee9c gi\u1ea3i b\u00e0i. C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3, b\u1ea3ng bi\u1ec3u ho\u1eb7c c\u00f4ng th\u1ee9c \u0111\u1ec3 t\u1ed5 ch\u1ee9c suy ngh\u0129.<\/p>\n

Th\u1ef1c hi\u1ec7n gi\u1ea3i<\/strong>: \u00c1p d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111\u00e3 l\u1eadp k\u1ebf ho\u1ea1ch. L\u00e0m t\u1eebng b\u01b0\u1edbc m\u1ed9t, kh\u00f4ng v\u1ed9i v\u00e0ng \u0111\u1ec3 tr\u00e1nh sai s\u00f3t.<\/p>\n

Ki\u1ec3m tra l\u1ea1i k\u1ebft qu\u1ea3:<\/strong>\u00a0Sau khi c\u00f3 k\u1ebft qu\u1ea3, h\u00e3y xem l\u1ea1i c\u00e1c b\u01b0\u1edbc \u0111\u00e3 l\u00e0m v\u00e0 ki\u1ec3m tra t\u00ednh h\u1ee3p l\u00fd c\u1ee7a k\u1ebft qu\u1ea3. So s\u00e1nh v\u1edbi d\u1eef li\u1ec7u ban \u0111\u1ea7u \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh ch\u00ednh x\u00e1c.<\/p>\n

Th\u1ea3o lu\u1eadn v\u00e0 ph\u00e2n t\u00edch:<\/strong>\u00a0N\u1ebfu c\u00f3 th\u1eddi gian, h\u00e3y th\u1ea3o lu\u1eadn v\u1edbi b\u1ea1n b\u00e8 ho\u1eb7c b\u1ed1 m\u1eb9\u00a0v\u1ec1 c\u00e1ch gi\u1ea3i. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 gi\u00fap ph\u00e1t hi\u1ec7n l\u1ed7i v\u00e0 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng t\u01b0 duy c\u1ee7a con.<\/p>\n

Luy\u1ec7n t\u1eadp th\u01b0\u1eddng xuy\u00ean:<\/strong>\u00a0\u0110\u1ec3 n\u00e2ng cao k\u1ef9 n\u0103ng gi\u1ea3i to\u00e1n, b\u1ed1 m\u1eb9 c\u1ea7n khuy\u1ebfn kh\u00edch con l\u00e0m nhi\u1ec1u b\u00e0i t\u1eadp kh\u00e1c nhau, t\u1eeb \u0111\u01a1n gi\u1ea3n \u0111\u1ebfn ph\u1ee9c t\u1ea1p. T\u1eeb \u0111\u00f3 con c\u00f3 th\u1ec3 r\u00fat ra \u0111\u01b0\u1ee3c nhi\u1ec1u kinh nghi\u1ec7m cho b\u1ea3n th\u00e2n m\u00ecnh.<\/p>\n

Ngo\u00e0i ra n\u1ebfu con c\u00f3 ni\u1ec1m \u0111am m\u00ea, h\u1ee9ng th\u00fa v\u1edbi m\u00f4n to\u00e1n h\u1ecdc th\u00ec c\u0169ng c\u00f3 th\u1ec3 l\u00e0m t\u1ed1t b\u00e0i to\u00e1n h\u01a1n d\u00f9 c\u00f3 b\u1ea5t k\u00ec tr\u01b0\u1eddng h\u1ee3p n\u00e0o x\u1ea3y ra. B\u1ed1 m\u1eb9 c\u00f3 th\u1ec3\u00a0gi\u00fap con\u00a0c\u00f3 h\u1ee9ng th\u00fa h\u1ecdc to\u00e1n:<\/p>\n

– B\u1ed1 m\u1eb9 c\u1ea7n ph\u1ea3i \u0111\u1ecbnh v\u1ecb nh\u1eadn th\u1ee9c c\u1ee7a con \u0111\u1ec3 x\u00e2y d\u1ef1ng l\u1ed9 tr\u00ecnh ph\u00f9 h\u1ee3p. B\u1ed1 m\u1eb9 l\u00ean l\u1ed9 tr\u00ecnh ph\u1ea3i ph\u1ee5 thu\u1ed9c v\u00e0o n\u0103ng l\u1ef1c c\u1ee7a tr\u1ebb v\u00e0 c\u0169ng kh\u00f4ng n\u00ean d\u1ea1y qu\u00e1 nhi\u1ec1u cho con. N\u1ebfu con c\u00f3 n\u0103ng l\u1ef1c t\u01b0 duy to\u00e1n, ph\u1ee5 huynh\u00a0c\u1ea7n khuy\u1ebfn kh\u00edch, c\u00f2n con k\u00e9m, c\u00e1c k\u1ef9 n\u0103ng ch\u01b0a t\u1ed1t, b\u1ed1 m\u1eb9 n\u00ean r\u00e8n luy\u1ec7n d\u1ea7n.<\/p>\n

– B\u1ed1 m\u1eb9 c\u0169ng kh\u00f4ng n\u00ean \u0111\u00e1nh \u0111\u1ed3ng chung, so s\u00e1nh con v\u1edbi c\u00e1c b\u1ea1n v\u00ec m\u1ed7i \u0111\u1ee9a tr\u1ebb kh\u00e1c nhau v\u00e0 \u0111\u1ee9a tr\u1ebb ti\u1ec1m n\u0103ng l\u00e0 khi l\u1edbn l\u00ean m\u00e0\u00a0n\u00ean ph\u00e2n b\u1ed5, s\u1eafp x\u1ebfp th\u1eddi gian bi\u1ec3u ph\u00f9 h\u1ee3p cho con, gi\u00fap tr\u1ebb\u00a0k\u00edch th\u00edch, h\u1ee9ng th\u00fa ti\u1ebfp nh\u1eadn ki\u1ebfn th\u1ee9c.<\/p>\n

– \u0110\u1ec3 t\u1ea1o h\u1ee9ng th\u00fa h\u1ecdc to\u00e1n \u1edf nh\u00e0 cho con, b\u1ed1 m\u1eb9 c\u00f3 th\u1ec3 k\u1ec3 nh\u1eefng c\u00e2u chuy\u1ec7n ph\u00f9 h\u1ee3p l\u1ee9a tu\u1ed5i v\u00e0 c\u00f3 c\u01a1 ch\u1ebf cho t\u1eebng tr\u1ebb, khuy\u1ebfn kh\u00edch ch\u00fang kh\u00e1m ph\u00e1 nh\u1eb1m t\u1ea1o h\u1ee9ng th\u00fa, ph\u00e1t tri\u1ec3n h\u1ebft t\u01b0 duy.<\/p>\n

– B\u1ed1 m\u1eb9 h\u00e3y \u0111\u1ec3 con t\u1ef1 l\u1ef1c, t\u1ef1 ch\u01a1i v\u00e0 t\u1ef1 gi\u1ea3i quy\u1ebft trong m\u00f4i tr\u01b0\u1eddng an to\u00e0n. T\u00ednh s\u00e1ng t\u1ea1o s\u1ebd gi\u00fap con bi\u1ebft c\u00e1ch gi\u1ea3i quy\u1ebft.<\/p>\n

Theo b\u00e1o Ph\u1ee5 n\u1eef m\u1edbi c\u00f3 b\u00e0i Con l\u00e0m ph\u00e9p t\u00ednh 40 : 5 = 8 b\u1ecb g\u1ea1ch sai, ng\u01b0\u1eddi m\u1eb9 b\u1ee9c x\u00fac l\u00ean tr\u01b0\u1eddng “ki\u1ec7n” th\u00ec b\u1ecb c\u00f4 gi\u00e1o ph\u00e1n xanh r\u1eddn: Ch\u1ecb xem l\u1ea1i ki\u1ebfn th\u1ee9c \u0111i! N\u1ed9i dung nh\u01b0 sau:<\/strong><\/p>\n

Khi c\u00f2n ng\u1ed3i tr\u00ean gh\u1ebf nh\u00e0 tr\u01b0\u1eddng, To\u00e1n h\u1ecdc ch\u1eafc h\u1eb3n l\u00e0 m\u00f4n h\u1ecdc “\u00e1m \u1ea3nh” c\u1ee7a nhi\u1ec1u ng\u01b0\u1eddi v\u00ec s\u1ef1 l\u1eaft l\u00e9o, h\u1ecdc \u0111au n\u00e3o c\u1ee7a n\u00f3. Tuy nhi\u00ean, v\u00ec \u0111\u00e2y l\u00e0 m\u00f4n h\u1ecdc quan tr\u1ecdng n\u00ean d\u00f9 c\u00f3 ch\u1eb3ng \u01b0a n\u00f3 th\u00ec c\u0169ng ph\u1ea3i t\u1eadp trung h\u1ecdc t\u1eadp cho ra ng\u00f4 ra khoai. Th\u1ea5u hi\u1ec3u \u0111i\u1ec1u \u0111\u00f3, n\u00ean ngay t\u1eeb c\u1ea5p 1, nhi\u1ec1u ph\u1ee5 huynh \u0111\u00e3 k\u00e8m c\u1eb7p con m\u00f4n n\u00e0y r\u1ea5t g\u1eaft gao.<\/p>\n

M\u1ed9t v\u1ecb ph\u1ee5 huynh h\u1ecd H\u1ed3 (40 tu\u1ed5i, Trung Qu\u1ed1c) c\u00f3 c\u1eadu con trai \u0111ang h\u1ecdc l\u1edbp 4 t\u1ea1i m\u1ed9t tr\u01b0\u1eddng ti\u1ec3u h\u1ecdc \u1edf \u0111\u1ecba ph\u01b0\u01a1ng. Trong b\u00e0i ki\u1ec3m tra m\u1edbi \u0111\u00e2y c\u1ee7a con trai, ng\u01b0\u1eddi m\u1eb9 n\u00e0y t\u1ecf r\u00f5 s\u1ef1 th\u1ea5t v\u1ecdng khi con kh\u00f4ng \u0111\u1ea1t \u0111i\u1ec3m tuy\u1ec7t \u0111\u1ed1i ch\u1ec9 v\u00ec sai m\u1ed9t c\u00e2u… d\u1ec5 \u1ee3t. Theo \u0111\u00f3, \u0111\u1ec1 b\u00e0i nh\u01b0 sau:\u00a0C\u00f3 40 \u0111\u1ee9a tr\u1ebb c\u1ea7n sang s\u00f4ng nh\u01b0ng chi\u1ebfc \u0111\u00f2 m\u1ed7i l\u1ea7n ch\u1ec9 c\u00f3 th\u1ec3 ch\u1edf 5 ng\u01b0\u1eddi, h\u1ecfi c\u1ea7n \u0111i bao nhi\u00eau chuy\u1ebfn \u0111\u00f2 \u0111\u1ec3 ch\u1edf h\u1ebft s\u1ed1 tr\u1ebb n\u00e0y qua kia s\u00f4ng?<\/strong><\/p>\n

C\u00e1ch gi\u1ea3i c\u1ee7a c\u1eadu b\u00e9 cho b\u00e0i to\u00e1n n\u00e0y l\u00e0 l\u1ea5y s\u1ed1 \u0111\u1ee9a tr\u1ebb chia cho s\u1ed1 tr\u1ebb m\u00e0 m\u1ed7i chuy\u1ebfn \u0111\u00f2 \u0111\u01b0\u1ee3c ph\u00e9p ch\u1edf \u0111\u1ec3 ra s\u1ed1 chuy\u1ebfn \u0111\u00f2 c\u1ea7n \u0111i, t\u1ee9c ph\u00e9p t\u00ednh:\u00a040 : 5 = 8.<\/strong><\/p>\n

<\/div>\n

C\u00e1ch l\u00e0m c\u1ee7a c\u1eadu b\u00e9 t\u01b0\u1edfng \u0111\u00fang nh\u01b0ng l\u1ea1i b\u1ecb gi\u00e1o vi\u00ean g\u1ea1ch sai<\/p>\n

B\u1ea3n th\u00e2n ng\u01b0\u1eddi m\u1eb9 nh\u1eadn th\u1ea5y c\u00e1ch l\u00e0m c\u1ee7a con ch\u1eb3ng c\u00f3 g\u00ec v\u00f4 l\u00fd c\u1ea3, t\u1ea1i sao c\u00f4 l\u1ea1i g\u1ea1ch sai \u0111\u01b0\u1ee3c. V\u1eady n\u00ean, ng\u01b0\u1eddi m\u1eb9 n\u00e0y \u0111\u00e3 l\u00ean tr\u01b0\u1eddng \u0111\u1ec3 “ki\u1ec7n” c\u00f4 gi\u00e1o nh\u1eb1m l\u1ea5y l\u1ea1i c\u00f4ng b\u1eb1ng cho con trai. Tuy nhi\u00ean, nh\u1eefng l\u1eddi c\u00f4 gi\u00e1o gi\u1ea3i th\u00edch sau \u0111\u00f3 khi\u1ebfn ch\u1ecb kh\u00f4ng kh\u1ecfi ng\u01b0\u1ee3ng ng\u1eadp v\u00e0 bu\u1ed9c l\u00f2ng th\u1eeba nh\u1eadn con trai \u0111\u00e3 \u0111\u1eb7t ph\u00e9p t\u00ednh sai.<\/p>\n

C\u1ee5 th\u1ec3, c\u00f4 gi\u00e1o gi\u1ea3i th\u00edch b\u00e0i to\u00e1n kh\u00f4ng \u0111\u01b0\u1ee3c gi\u1ea3i theo c\u00f4ng th\u1ee9c th\u00f4ng th\u01b0\u1eddng l\u00e0 40 : m\u00e0 c\u1ea7n ph\u1ea3i c\u00f3 ch\u00fat li\u00ean h\u1ec7 th\u1ef1c t\u1ebf. \u1ede \u0111\u1ec1 b\u00e0i \u0111\u00e3 n\u00eau r\u00f5, ng\u01b0\u1eddi c\u1ea7n sang kia s\u00f4ng l\u00e0 tr\u1ebb em n\u00ean kh\u00f4ng th\u1ec3 t\u1ef1 ch\u00e8o \u0111\u00f2 m\u00e0 c\u1ea7n c\u00f3 m\u1ed9t ng\u01b0\u1eddi l\u00e1i \u0111\u00f2 l\u00e0 ng\u01b0\u1eddi l\u1edbn. Do \u0111\u00f3, m\u1ed7i chuy\u1ebfn ch\u1ec9 c\u00f3 th\u1ec3 ch\u1edf \u0111\u01b0\u1ee3c 4 ng\u01b0\u1eddi l\u00e0 4 \u0111\u1ee9a tr\u1ebb v\u00e0 t\u00ednh th\u00eam 1 ng\u01b0\u1eddi l\u00e1i \u0111\u00f2 n\u1eefa l\u00e0 5.<\/p>\n

=> K\u1ebft qu\u1ea3 b\u00e0i To\u00e1n l\u00e0:\u00a040 : 4 = 10.<\/strong><\/p>\n

V\u1eady c\u1ea7n \u0111i 10 chuy\u1ebfn \u0111\u00f2 \u0111\u1ec3 ch\u1edf h\u1ebft s\u1ed1 tr\u1ebb n\u00e0y qua kia s\u00f4ng.<\/p>\n

Th\u1ebf m\u1edbi th\u1ea5y, kh\u00f4ng ph\u1ea3i b\u00e0i to\u00e1n ti\u1ec3u h\u1ecdc n\u00e0o c\u0169ng d\u1ec5 c\u1ea3. \u0110\u01a1n c\u1eed nh\u01b0 \u1edf c\u00e2u h\u1ecfi n\u00e0y, n\u00f3 kh\u00f4ng ch\u1ec9 l\u00e0 ph\u00e9p c\u1ed9ng, tr\u1eeb, nh\u00e2n, chia th\u00f4ng th\u01b0\u1eddng m\u00e0 y\u00eau c\u1ea7u h\u1ecdc sinh ph\u1ea3i t\u01b0 duy logic \u0111\u1ec3 lu\u1eadn gi\u1ea3i v\u1ea5n \u0111\u1ec1, \u00e1p d\u1ee5ng b\u00e0i h\u1ecdc th\u1ef1c t\u1ebf v\u00e0o cu\u1ed9c s\u1ed1ng.<\/p>\n","protected":false},"excerpt":{"rendered":"

Nhi\u1ec1u ng\u01b0\u1eddi \u0111\u00e1nh gi\u00e1 l\u1ed7i sai c\u1ee7a c\u00f4 gi\u00e1o m\u1edbi l\u00e0 nghi\u00eam tr\u1ecdng. Theo b\u00e1o Ph\u1ee5 n\u1eef Ph\u00e1p lu\u1eadt c\u00f3 b\u00e0i Con l\u00e0m to\u00e1n “98-10=88” b\u1ecb g\u1ea1ch sai, ph\u1ee5 huynh t\u1ee9c gi\u1eadn khi xem ph\u00e9p t\u00ednh c\u1ee7a c\u00f4 gi\u00e1o. N\u1ed9i dung nh\u01b0 sau: Quan s\u00e1t v\u00e0 \u0111\u1ecdc k\u0129 b\u00e0i to\u00e1n l\u00e0 m\u1ed9t trong nh\u1eefng k\u1ef9 […]<\/p>\n","protected":false},"author":2,"featured_media":9145,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":"","footnotes":""},"categories":[5],"tags":[],"class_list":{"0":"post-9144","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-tin-tuc"},"yoast_head":"\nCon l\u00e0m to\u00e1n "98-10=88" b\u1ecb g\u1ea1ch sai, ph\u1ee5 huynh t:\u1ee9c gi:\u1eadn khi xem ph\u00e9p t\u00ednh c\u1ee7a c\u00f4 gi\u00e1o - Everyday Life<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/tintuc.lifestruepurpose.org\/?p=9144\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Con l\u00e0m to\u00e1n "98-10=88" b\u1ecb g\u1ea1ch sai, ph\u1ee5 huynh t:\u1ee9c gi:\u1eadn khi xem ph\u00e9p t\u00ednh c\u1ee7a c\u00f4 gi\u00e1o - Everyday Life\" \/>\n<meta property=\"og:description\" content=\"Nhi\u1ec1u ng\u01b0\u1eddi \u0111\u00e1nh gi\u00e1 l\u1ed7i sai c\u1ee7a c\u00f4 gi\u00e1o m\u1edbi l\u00e0 nghi\u00eam tr\u1ecdng. 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