{"id":13291,"date":"2024-11-05T10:46:31","date_gmt":"2024-11-05T10:46:31","guid":{"rendered":"https:\/\/aucometoi.com\/?p=13291"},"modified":"2024-11-05T10:55:34","modified_gmt":"2024-11-05T10:55:34","slug":"de-bai-toan-1-5-5-11-hieu-dung-tranh-buc-xuc","status":"publish","type":"post","link":"https:\/\/aucometoi.com\/en\/de-bai-toan-1-5-5-11-hieu-dung-tranh-buc-xuc\/","title":{"rendered":"\u0110\u1ec1 B\u00e0i To\u00e1n 1 + 5 + 5 = 11: Hi\u1ec3u \u0110\u00fang Tr\u00e1nh B\u1ee9c X\u00fac"},"content":{"rendered":"

\u0110\u1ec1 b\u00e0i to\u00e1n g\u00e2y tranh c\u00e3i d\u1eef d\u1ed9i \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng tr\u00ean m\u1ea1ng x\u00e3 h\u1ed9i, thu h\u00fat s\u1ef1 ch\u00fa \u00fd c\u1ee7a nhi\u1ec1u ng\u01b0\u1eddi t\u1eeb h\u1ecdc sinh, gi\u00e1o vi\u00ean cho \u0111\u1ebfn c\u00e1c chuy\u00ean gia to\u00e1n h\u1ecdc. M\u1eb7c d\u00f9 tho\u1ea1t nh\u00ecn c\u00f3 v\u1ebb \u0111\u01a1n gi\u1ea3n, nh\u01b0ng \u0111\u1ec1 b\u00e0i n\u00e0y l\u1ea1i ch\u1ee9a \u0111\u1ef1ng nh\u1eefng y\u1ebfu t\u1ed1 ph\u1ee9c t\u1ea1p khi\u1ebfn nhi\u1ec1u ng\u01b0\u1eddi ph\u1ea3i \u0111au \u0111\u1ea7u suy ngh\u0129.<\/p>\n

V\u1ea5n \u0111\u1ec1 n\u1eb1m \u1edf ch\u1ed7 c\u00e1ch gi\u1ea3i th\u00edch v\u00e0 ti\u1ebfp c\u1eadn b\u00e0i to\u00e1n kh\u00f4ng \u0111\u01b0\u1ee3c th\u1ed1ng nh\u1ea5t, d\u1eabn \u0111\u1ebfn nhi\u1ec1u c\u00e1ch hi\u1ec3u kh\u00e1c nhau. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 g\u00e2y kh\u00f3 kh\u0103n cho vi\u1ec7c t\u00ecm ra \u0111\u00e1p \u00e1n ch\u00ednh x\u00e1c m\u00e0 c\u00f2n t\u1ea1o ra nh\u1eefng cu\u1ed9c tranh lu\u1eadn n\u1ea3y l\u1eeda v\u1ec1 ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3ng d\u1ea1y v\u00e0 \u0111\u00e1nh gi\u00e1 n\u0103ng l\u1ef1c t\u01b0 duy c\u1ee7a h\u1ecdc sinh.<\/p>\n

Ng\u01b0\u1eddi ta c\u1ea7n th\u1eadn tr\u1ecdng khi \u0111\u1ed1i di\u1ec7n v\u1edbi nh\u1eefng \u0111\u1ec1 b\u00e0i nh\u01b0 th\u1ebf n\u00e0y. Kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 t\u00ecm ra \u0111\u00e1p \u00e1n \u0111\u00fang hay sai, m\u00e0 c\u00f2n ph\u1ea3i xem x\u00e9t k\u1ef9 l\u01b0\u1ee1ng c\u00e1c kh\u00eda c\u1ea1nh kh\u00e1c nh\u01b0 m\u1ee5c \u0111\u00edch gi\u00e1o d\u1ee5c v\u00e0 kh\u1ea3 n\u0103ng \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf. H\u00e3y nh\u1edb r\u1eb1ng, m\u1ed7i b\u00e0i to\u00e1n \u0111\u1ec1u c\u00f3 th\u1ec3 mang l\u1ea1i m\u1ed9t b\u00e0i h\u1ecdc qu\u00fd gi\u00e1 n\u1ebfu ch\u00fang ta bi\u1ebft c\u00e1ch nh\u00ecn nh\u1eadn \u0111\u00fang \u0111\u1eafn v\u00e0 c\u00f4ng b\u1eb1ng.<\/p>\n

To\u00e1n h\u1ecdc kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 nh\u1eefng con s\u1ed1 v\u00e0 ph\u00e9p t\u00ednh kh\u00f4 khan.<\/h5>\n

\u1ea8n s\u00e2u trong \u0111\u00f3 l\u00e0 nh\u1eefng c\u00e2u h\u1ecfi t\u01b0 duy logic \u0111\u1ea7y th\u00e1ch th\u1ee9c, \u0111\u00f2i h\u1ecfi ng\u01b0\u1eddi h\u1ecdc ph\u1ea3i c\u00f3 kh\u1ea3 n\u0103ng quan s\u00e1t tinh t\u1ebf v\u00e0 li\u00ean t\u01b0\u1edfng ch\u1eb7t ch\u1ebd. \u0110\u1eb7c bi\u1ec7t, nhi\u1ec1u \u0111\u1ec1 b\u00e0i To\u00e1n th\u01b0\u1eddng c\u00e0i c\u1eafm nh\u1eefng d\u1eef li\u1ec7u “b\u1eaby” khi\u1ebfn ng\u01b0\u1eddi gi\u1ea3i d\u1ec5 m\u1eafc sai l\u1ea7m n\u1ebfu kh\u00f4ng suy ngh\u0129 k\u1ef9 c\u00e0ng.<\/p>\n

\u0110\u1ed1i m\u1eb7t v\u1edbi c\u00e1c \u0111\u1ec1 b\u00e0i To\u00e1n ph\u1ee9c t\u1ea1p, m\u1ed9t tr\u00ed tu\u1ec7 s\u1eafc b\u00e9n c\u00f9ng v\u1edbi IQ cao th\u01b0\u1eddng \u0111\u01b0\u1ee3c xem l\u00e0 l\u1ee3i th\u1ebf l\u1edbn. Tuy nhi\u00ean, \u0111i\u1ec1u quan tr\u1ecdng h\u01a1n c\u1ea3 l\u00e0 s\u1ef1 ki\u00ean nh\u1eabn v\u00e0 kh\u1ea3 n\u0103ng ph\u00e2n t\u00edch v\u1ea5n \u0111\u1ec1 m\u1ed9t c\u00e1ch to\u00e0n di\u1ec7n. Nh\u1eefng b\u1eaby trong c\u00e1c b\u00e0i to\u00e1n \u0111\u00f4i khi r\u1ea5t kh\u00f3 ph\u00e1t hi\u1ec7n ngay t\u1eeb \u0111\u1ea7u, y\u00eau c\u1ea7u ch\u00fang ta ph\u1ea3i b\u00ecnh t\u0129nh \u0111\u00e1nh gi\u00e1 t\u1eebng chi ti\u1ebft nh\u1ecf nh\u1ea5t tr\u01b0\u1edbc khi \u0111\u01b0a ra \u0111\u00e1p \u00e1n cu\u1ed1i c\u00f9ng.<\/p>\n

V\u00ec v\u1eady, khi ti\u1ebfp c\u1eadn v\u1edbi c\u00e1c b\u00e0i to\u00e1n kh\u00f3 kh\u0103n n\u00e0y, h\u00e3y lu\u00f4n gi\u1eef cho m\u00ecnh m\u1ed9t c\u00e1i \u0111\u1ea7u l\u1ea1nh v\u00e0 \u0111\u1eebng v\u1ed9i v\u00e3 k\u1ebft lu\u1eadn. H\u00e3y nh\u1edb r\u1eb1ng m\u1ed7i con s\u1ed1 hay d\u1eef ki\u1ec7n \u0111\u1ec1u c\u00f3 th\u1ec3 mang \u0111\u1ebfn manh m\u1ed1i quan tr\u1ecdng \u0111\u1ec3 th\u00e1o g\u1ee1 v\u1ea5n \u0111\u1ec1. H\u00e3y c\u1ea3nh gi\u00e1c v\u1edbi nh\u1eefng th\u00f4ng tin t\u01b0\u1edfng ch\u1eebng nh\u01b0 r\u00f5 r\u00e0ng nh\u01b0ng th\u1ef1c ch\u1ea5t l\u1ea1i che gi\u1ea5u nhi\u1ec1u \u0111i\u1ec1u b\u1ea5t ng\u1edd ph\u00eda sau!<\/p>\n

Khi nghe qua \u0111\u1ec1 b\u00e0i to\u00e1n n\u00e0y, nhi\u1ec1u ng\u01b0\u1eddi c\u00f3 th\u1ec3 ngh\u0129 r\u1eb1ng \u0111\u00e2y l\u00e0 m\u1ed9t c\u00e2u h\u1ecfi \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 d\u00e0ng gi\u1ea3i quy\u1ebft.<\/h5>\n

Tuy nhi\u00ean, th\u1ef1c t\u1ebf \u0111\u00e3 ch\u1ee9ng minh \u0111i\u1ec1u ng\u01b0\u1ee3c l\u1ea1i khi n\u00f3 tr\u1edf th\u00e0nh ch\u1ee7 \u0111\u1ec1 g\u00e2y tranh c\u00e3i k\u1ecbch li\u1ec7t tr\u00ean m\u1ea1ng x\u00e3 h\u1ed9i Trung Qu\u1ed1c. \u0110\u1ec1 b\u00e0i: “Ti\u1ec3u Minh tham gia m\u1ed9t cu\u1ed9c thi ch\u1ea1y \u1edf tr\u01b0\u1eddng.<\/p>\n

Tr\u00ean \u0111\u01b0\u1eddng \u0111ua v\u00f2ng tr\u00f2n, c\u00f3 5 ng\u01b0\u1eddi ph\u00eda tr\u01b0\u1edbc Ti\u1ec3u Minh v\u00e0 5 ng\u01b0\u1eddi ph\u00eda sau, t\u1ed5ng c\u1ed9ng c\u00f3 bao nhi\u00eau ng\u01b0\u1eddi?” tho\u1ea1t nh\u00ecn kh\u00f4ng h\u1ec1 kh\u00f3 nh\u1eb1n.<\/p>\n

Tuy nhi\u00ean, ch\u00ednh s\u1ef1 \u0111\u01a1n gi\u1ea3n \u0111\u00f3 l\u1ea1i khi\u1ebfn nhi\u1ec1u ng\u01b0\u1eddi r\u01a1i v\u00e0o b\u1eaby t\u01b0 duy. M\u1ed9t s\u1ed1 ng\u01b0\u1eddi v\u1ed9i v\u00e0ng k\u1ebft lu\u1eadn r\u1eb1ng ch\u1ec9 c\u1ea7n c\u1ed9ng s\u1ed1 l\u01b0\u1ee3ng ng\u01b0\u1eddi ph\u00eda tr\u01b0\u1edbc v\u00e0 ph\u00eda sau Ti\u1ec3u Minh v\u1edbi ch\u00ednh c\u1eadu \u1ea5y l\u00e0 ra \u0111\u00e1p \u00e1n. Nh\u01b0ng n\u1ebfu suy ngh\u0129 k\u1ef9 h\u01a1n v\u1ec1 c\u1ea5u tr\u00fac c\u1ee7a m\u1ed9t \u0111\u01b0\u1eddng \u0111ua v\u00f2ng tr\u00f2n, ta s\u1ebd th\u1ea5y v\u1ea5n \u0111\u1ec1 ph\u1ee9c t\u1ea1p h\u01a1n th\u1ebf.<\/p>\n

\u0110i\u1ec1u n\u00e0y nh\u1eafc nh\u1edf ch\u00fang ta v\u1ec1 t\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c \u0111\u1ecdc k\u1ef9 \u0111\u1ec1 b\u00e0i v\u00e0 hi\u1ec3u r\u00f5 b\u1ea3n ch\u1ea5t v\u1ea5n \u0111\u1ec1 tr\u01b0\u1edbc khi \u0111\u01b0a ra l\u1eddi gi\u1ea3i cu\u1ed1i c\u00f9ng.<\/h5>\n

\u0110\u00f4i khi nh\u1eefng c\u00e2u h\u1ecfi t\u01b0\u1edfng ch\u1eebng nh\u01b0 \u0111\u01a1n gi\u1ea3n l\u1ea1i ch\u1ee9a \u0111\u1ef1ng nh\u1eefng y\u1ebfu t\u1ed1 \u0111\u00e1nh l\u1eeba t\u01b0 duy m\u00e0 n\u1ebfu kh\u00f4ng c\u1ea9n th\u1eadn, ta r\u1ea5t d\u1ec5 m\u1eafc ph\u1ea3i sai l\u1ea7m c\u01a1 b\u1ea3n.<\/p>\n

\u2014<\/p>\n

M\u1ed9t b\u00e0i To\u00e1n t\u01b0\u1edfng ch\u1eebng \u0111\u01a1n gi\u1ea3n nh\u01b0ng l\u1ea1i g\u00e2y ra kh\u00f4ng \u00edt tranh c\u00e3i tr\u00ean c\u00e1c di\u1ec5n \u0111\u00e0n m\u1ea1ng Trung Qu\u1ed1c. \u0110\u1ec1 b\u00e0i nh\u01b0 sau: “Ti\u1ec3u Minh tham gia m\u1ed9t cu\u1ed9c thi ch\u1ea1y \u1edf tr\u01b0\u1eddng. Tr\u00ean \u0111\u01b0\u1eddng \u0111ua v\u00f2ng tr\u00f2n, c\u00f3 5 ng\u01b0\u1eddi ph\u00eda tr\u01b0\u1edbc Ti\u1ec3u Minh v\u00e0 5 ng\u01b0\u1eddi ph\u00eda sau, t\u1ed5ng c\u1ed9ng c\u00f3 bao nhi\u00eau ng\u01b0\u1eddi?”<\/p>\n

Nghe qua th\u00ec c\u00f3 v\u1ebb d\u1ec5 d\u00e0ng, nh\u01b0ng ch\u00ednh s\u1ef1 \u0111\u01a1n gi\u1ea3n n\u00e0y l\u1ea1i khi\u1ebfn nhi\u1ec1u ng\u01b0\u1eddi nh\u1ea7m l\u1eabn.<\/h5>\n

Khi \u0111\u1ed1i m\u1eb7t v\u1edbi nh\u1eefng \u0111\u1ec1 b\u00e0i nh\u01b0 th\u1ebf n\u00e0y, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i \u0111\u1ecdc k\u1ef9 v\u00e0 ph\u00e2n t\u00edch t\u1eebng chi ti\u1ebft. C\u00e2u h\u1ecfi kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 ph\u00e9p t\u00ednh c\u1ed9ng m\u00e0 c\u00f2n y\u00eau c\u1ea7u kh\u1ea3 n\u0103ng t\u01b0 duy logic v\u00e0 h\u00ecnh dung t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, c\u1ea7n ch\u00fa \u00fd r\u1eb1ng Ti\u1ec3u Minh c\u0169ng n\u1eb1m trong s\u1ed1 nh\u1eefng ng\u01b0\u1eddi \u0111ang ch\u1ea1y \u0111ua.<\/p>\n

V\u00ec v\u1eady, c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang s\u1ebd kh\u00f4ng ch\u1ec9 d\u1ef1a v\u00e0o ph\u00e9p t\u00ednh s\u01a1 s\u00e0i m\u00e0 ph\u1ea3i c\u00e2n nh\u1eafc \u0111\u1ebfn v\u1ecb tr\u00ed c\u1ee7a Ti\u1ec3u Minh trong t\u1ed5ng s\u1ed1 v\u1eadn \u0111\u1ed9ng vi\u00ean.<\/p>\n

\u0110\u1ec1 B\u00e0i To\u00e1n n\u00e0y l\u00e0 m\u1ed9t v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh cho th\u1ea5y r\u1eb1ng \u0111\u00f4i khi nh\u1eefng g\u00ec ch\u00fang ta cho l\u00e0 hi\u1ec3n nhi\u00ean l\u1ea1i c\u1ea7n \u0111\u01b0\u1ee3c xem x\u00e9t k\u1ef9 l\u01b0\u1ee1ng h\u01a1n \u0111\u1ec3 tr\u00e1nh m\u1eafc sai l\u1ea7m.<\/h5>\n

H\u00e3y lu\u00f4n c\u1ea9n th\u1eadn v\u1edbi c\u00e1c chi ti\u1ebft nh\u1ecf nh\u1ea5t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea1n hi\u1ec3u r\u00f5 v\u1ea5n \u0111\u1ec1 tr\u01b0\u1edbc khi \u0111\u01b0a ra k\u1ebft lu\u1eadn cu\u1ed1i c\u00f9ng.<\/p>\n

Trong m\u1ed9t b\u00e0i to\u00e1n t\u01b0\u1edfng ch\u1eebng \u0111\u01a1n gi\u1ea3n, khi em h\u1ecdc sinh \u0111\u01b0a ra \u0111\u00e1p \u00e1n 1 + 5 + 5 = 11, c\u1ea3 gia \u0111\u00ecnh \u0111\u1ec1u \u0111\u1ed3ng t\u00ecnh v\u1edbi k\u1ebft qu\u1ea3 n\u00e0y. Tuy nhi\u00ean, th\u1ea7y gi\u00e1o l\u1ea1i cho r\u1eb1ng \u0111\u00e1p \u00e1n \u0111\u00f3 sai. \u0110i\u1ec1u n\u00e0y khi\u1ebfn ph\u1ee5 huynh b\u0103n kho\u0103n v\u00e0 quy\u1ebft \u0111\u1ecbnh h\u1ecfi l\u1ea1i th\u1ea7y gi\u00e1o \u0111\u1ec3 t\u00ecm hi\u1ec3u r\u00f5 h\u01a1n.<\/p>\n

Th\u1ea7y gi\u00e1o gi\u1ea3i th\u00edch r\u1eb1ng do b\u00e0i to\u00e1n \u0111\u01b0\u1ee3c \u0111\u1eb7t trong b\u1ed1i c\u1ea3nh c\u1ee7a m\u1ed9t cu\u1ed9c \u0111ua v\u00f2ng tr\u00f2n kh\u00e9p k\u00edn, n\u1ebfu l\u1ea5y Ti\u1ec3u Minh l\u00e0m m\u1ed1c th\u00ec s\u1ed1 ng\u01b0\u1eddi ph\u00eda sau c\u0169ng ch\u00ednh l\u00e0 s\u1ed1 ng\u01b0\u1eddi ph\u00eda tr\u01b0\u1edbc. \u0110\u00e2y l\u00e0 m\u1ed9t d\u1ea1ng \u0111\u1ec1 b\u00e0i to\u00e1n y\u00eau c\u1ea7u s\u1ef1 t\u01b0 duy ngo\u00e0i khu\u00f4n kh\u1ed5 th\u00f4ng th\u01b0\u1eddng v\u00e0 kh\u00f4ng ch\u1ec9 d\u1ef1a v\u00e0o ph\u00e9p t\u00ednh c\u1ed9ng \u0111\u01a1n thu\u1ea7n.<\/p>\n

C\u00e2u chuy\u1ec7n n\u00e0y nh\u1eafc nh\u1edf ch\u00fang ta v\u1ec1 t\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c hi\u1ec3u r\u00f5 ng\u1eef c\u1ea3nh v\u00e0 \u0111i\u1ec1u ki\u1ec7n c\u1ee7a \u0111\u1ec1 b\u00e0i to\u00e1n tr\u01b0\u1edbc khi \u0111\u01b0a ra k\u1ebft lu\u1eadn.<\/h5>\n

\u0110\u00f4i khi, nh\u1eefng g\u00ec hi\u1ec3n nhi\u00ean c\u00f3 th\u1ec3 kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng \u0111\u00fang n\u1ebfu thi\u1ebfu \u0111i s\u1ef1 ph\u00e2n t\u00edch k\u1ef9 l\u01b0\u1ee1ng v\u00e0 c\u1ea9n tr\u1ecdng.<\/p>\n

\u2014<\/p>\n

Trong m\u1ed9t t\u00ecnh hu\u1ed1ng th\u00fa v\u1ecb v\u00e0 c\u00f3 ph\u1ea7n g\u00e2y tranh c\u00e3i, m\u1ed9t b\u00e0i to\u00e1n \u0111\u01a1n gi\u1ea3n \u0111\u00e3 khi\u1ebfn c\u1ea3 gia \u0111\u00ecnh \u0111\u1ed3ng t\u00ecnh v\u1edbi \u0111\u00e1p \u00e1n c\u1ee7a em h\u1ecdc sinh, nh\u01b0ng l\u1ea1i b\u1ecb th\u1ea7y gi\u00e1o \u0111\u00e1nh gi\u00e1 l\u00e0 sai. B\u00e0i to\u00e1n y\u00eau c\u1ea7u t\u00ednh t\u1ed5ng 1 + 5 + 5 v\u00e0 k\u1ebft qu\u1ea3 \u0111\u01b0\u1ee3c \u0111\u01b0a ra l\u00e0 11.<\/p>\n

Tuy nhi\u00ean, khi ph\u1ee5 huynh th\u1eafc m\u1eafc v\u1ec1 l\u00fd do t\u1ea1i sao \u0111\u00e1p \u00e1n b\u1ecb cho l\u00e0 sai, th\u1ea7y gi\u00e1o \u0111\u00e3 gi\u1ea3i th\u00edch d\u1ef1a tr\u00ean m\u1ed9t kh\u00e1i ni\u1ec7m b\u1ea5t ng\u1edd: \u201cV\u00ec ch\u1ea1y theo \u0111\u01b0\u1eddng \u0111ua v\u00f2ng tr\u00f2n kh\u00e9p k\u00edn, l\u1ea5y Ti\u1ec3u Minh l\u00e0m m\u1ed1c th\u00ec 5 ng\u01b0\u1eddi sau l\u01b0ng c\u0169ng ch\u00ednh l\u00e0 5 ng\u01b0\u1eddi tr\u01b0\u1edbc m\u1eb7t.”<\/h5>\n

\u0110\u1ec1 b\u00e0i to\u00e1n t\u01b0\u1edfng ch\u1eebng nh\u01b0 \u0111\u01a1n gi\u1ea3n n\u00e0y th\u1ef1c ch\u1ea5t l\u1ea1i ch\u1ee9a \u0111\u1ef1ng m\u1ed9t y\u1ebfu t\u1ed1 logic kh\u00f4ng d\u1ec5 nh\u1eadn th\u1ea5y ngay t\u1eeb \u0111\u1ea7u. N\u00f3 nh\u1eafc nh\u1edf ch\u00fang ta r\u1eb1ng trong h\u1ecdc t\u1eadp v\u00e0 cu\u1ed9c s\u1ed1ng, kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o m\u1ecdi th\u1ee9 c\u0169ng r\u00f5 r\u00e0ng nh\u01b0 v\u1ebb b\u1ec1 ngo\u00e0i. Nh\u1eefng c\u00e2u h\u1ecfi t\u01b0\u1edfng ch\u1eebng nh\u01b0 d\u1ec5 d\u00e0ng \u0111\u00f4i khi l\u1ea1i y\u00eau c\u1ea7u ch\u00fang ta suy ngh\u0129 s\u00e2u h\u01a1n v\u1ec1 b\u1ea3n ch\u1ea5t v\u1ea5n \u0111\u1ec1.<\/p>\n

\u0110\u1ed1i v\u1edbi c\u00e1c b\u1eadc ph\u1ee5 huynh v\u00e0 gi\u00e1o vi\u00ean, \u0111\u00e2y c\u0169ng l\u00e0 l\u1eddi c\u1ea3nh t\u1ec9nh \u0111\u1ec3 h\u01b0\u1edbng d\u1eabn tr\u1ebb c\u00e1ch ti\u1ebfp c\u1eadn v\u1ea5n \u0111\u1ec1 t\u1eeb nhi\u1ec1u g\u00f3c \u0111\u1ed9 kh\u00e1c nhau tr\u01b0\u1edbc khi \u0111i \u0111\u1ebfn k\u1ebft lu\u1eadn cu\u1ed1i c\u00f9ng. Vi\u1ec7c gi\u1ea3ng d\u1ea1y kh\u00f4ng ch\u1ec9 d\u1eebng \u1edf vi\u1ec7c cung c\u1ea5p ki\u1ebfn th\u1ee9c m\u00e0 c\u00f2n c\u1ea7n khuy\u1ebfn kh\u00edch t\u01b0 duy s\u00e1ng t\u1ea1o v\u00e0 kh\u1ea3 n\u0103ng ph\u00e2n t\u00edch c\u1ee7a h\u1ecdc sinh \u0111\u1ec3 h\u1ecd c\u00f3 th\u1ec3 t\u1ef1 m\u00ecnh gi\u1ea3i quy\u1ebft nh\u1eefng th\u1eed th\u00e1ch ph\u1ee9c t\u1ea1p trong t\u01b0\u01a1ng lai.<\/p>\n

B\u00e0i To\u00e1n g\u00e2y tranh c\u00e3i<\/h3>\n

Trong th\u1eddi gian g\u1ea7n \u0111\u00e2y, m\u1ed9t \u0111\u1ec1 b\u00e0i to\u00e1n \u0111\u00e3 khi\u1ebfn c\u1ed9ng \u0111\u1ed3ng m\u1ea1ng d\u1eady s\u00f3ng v\u00e0 kh\u00f4ng ng\u1eebng tranh c\u00e3i v\u1ec1 c\u00e1ch gi\u1ea3i \u0111\u00fang. \u0110\u1ec1 b\u00e0i to\u00e1n tuy nh\u00ecn qua c\u00f3 v\u1ebb \u0111\u01a1n gi\u1ea3n nh\u01b0ng l\u1ea1i ch\u1ee9a \u0111\u1ef1ng nhi\u1ec1u y\u1ebfu t\u1ed1 ph\u1ee9c t\u1ea1p khi\u1ebfn ng\u01b0\u1eddi gi\u1ea3i d\u1ec5 m\u1eafc sai l\u1ea7m.<\/p>\n

\u0110i\u1ec1u n\u00e0y \u0111\u1eb7t ra m\u1ed9t c\u00e2u h\u1ecfi l\u1edbn: li\u1ec7u ch\u00fang ta c\u00f3 \u0111ang qu\u00e1 ph\u1ee5 thu\u1ed9c v\u00e0o nh\u1eefng c\u00f4ng c\u1ee5 t\u00ednh to\u00e1n hi\u1ec7n \u0111\u1ea1i m\u00e0 qu\u00ean \u0111i nh\u1eefng nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n c\u1ee7a to\u00e1n h\u1ecdc?<\/p>\n

S\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a c\u00e1c \u0111\u1ec1 b\u00e0i nh\u01b0 v\u1eady nh\u1eafc nh\u1edf ch\u00fang ta c\u1ea7n th\u1eadn tr\u1ecdng h\u01a1n trong vi\u1ec7c ti\u1ebfp nh\u1eadn th\u00f4ng tin v\u00e0 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1.<\/h5>\n

\u0110\u00f4i khi, ch\u1ec9 m\u1ed9t sai s\u00f3t nh\u1ecf trong qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch c\u0169ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn nh\u1eefng hi\u1ec3u l\u1ea7m l\u1edbn.<\/p>\n

V\u00ec v\u1eady, tr\u01b0\u1edbc khi \u0111\u01b0a ra b\u1ea5t k\u1ef3 k\u1ebft lu\u1eadn n\u00e0o, h\u00e3y \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea1n \u0111\u00e3 xem x\u00e9t k\u1ef9 l\u01b0\u1ee1ng m\u1ecdi kh\u00eda c\u1ea1nh c\u1ee7a v\u1ea5n \u0111\u1ec1 v\u00e0 kh\u00f4ng \u0111\u1ec3 b\u1ecb \u0111\u00e1nh l\u1eeba b\u1edfi v\u1ebb b\u1ec1 ngo\u00e0i \u0111\u01a1n gi\u1ea3n c\u1ee7a n\u00f3.<\/p>\n

\u0110\u1ec1 B\u00e0i To\u00e1n n\u00e0y c\u0169ng l\u00e0 l\u1eddi c\u1ea3nh t\u1ec9nh cho gi\u00e1o d\u1ee5c hi\u1ec7n \u0111\u1ea1i: l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 r\u00e8n luy\u1ec7n t\u01b0 duy ph\u1ea3n bi\u1ec7n cho h\u1ecdc sinh trong th\u1eddi \u0111\u1ea1i c\u00f4ng ngh\u1ec7 ph\u00e1t tri\u1ec3n nhanh ch\u00f3ng? Ch\u00fang ta c\u1ea7n t\u00ecm ra ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3ng d\u1ea1y ph\u00f9 h\u1ee3p \u0111\u1ec3 gi\u00fap c\u00e1c em kh\u00f4ng ch\u1ec9 bi\u1ebft c\u00e1ch s\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 m\u00e0 c\u00f2n hi\u1ec3u s\u00e2u s\u1eafc v\u1ec1 b\u1ea3n ch\u1ea5t c\u1ee7a ki\u1ebfn th\u1ee9c m\u00e0 m\u00ecnh \u0111ang h\u1ecdc.<\/p>\n

\u2014<\/h5>\n

### B\u00e0i To\u00e1n g\u00e2y tranh c\u00e3i<\/p>\n

Trong th\u1eddi gian g\u1ea7n \u0111\u00e2y, m\u1ed9t \u0110\u1ec1 B\u00e0i To\u00e1n \u0111\u00e3 tr\u1edf th\u00e0nh t\u00e2m \u0111i\u1ec3m c\u1ee7a nh\u1eefng cu\u1ed9c tranh lu\u1eadn s\u00f4i n\u1ed5i tr\u00ean c\u00e1c di\u1ec5n \u0111\u00e0n gi\u00e1o d\u1ee5c. Nh\u1eefng b\u00e0i to\u00e1n t\u01b0\u1edfng ch\u1eebng nh\u01b0 \u0111\u01a1n gi\u1ea3n nh\u01b0ng l\u1ea1i khi\u1ebfn nhi\u1ec1u ng\u01b0\u1eddi \u0111au \u0111\u1ea7u kh\u00f4ng ch\u1ec9 b\u1edfi \u0111\u1ed9 kh\u00f3 m\u00e0 c\u00f2n v\u00ec c\u00e1ch gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn nhi\u1ec1u c\u00e1ch hi\u1ec3u kh\u00e1c nhau.<\/p>\n

\u0110i\u1ec1u n\u00e0y \u0111\u1eb7t ra m\u1ed9t c\u00e2u h\u1ecfi l\u1edbn v\u1ec1 vi\u1ec7c thi\u1ebft k\u1ebf v\u00e0 m\u1ee5c ti\u00eau c\u1ee7a c\u00e1c \u0111\u1ec1 b\u00e0i trong gi\u00e1o d\u1ee5c hi\u1ec7n nay.<\/h5>\n

V\u1ea5n \u0111\u1ec1 kh\u00f4ng ch\u1ec9 n\u1eb1m \u1edf vi\u1ec7c t\u00ecm ra \u0111\u00e1p \u00e1n \u0111\u00fang, m\u00e0 c\u00f2n \u1edf kh\u1ea3 n\u0103ng ph\u00e2n t\u00edch v\u00e0 t\u01b0 duy ph\u1ea3n bi\u1ec7n c\u1ee7a h\u1ecdc sinh khi \u0111\u1ed1i m\u1eb7t v\u1edbi nh\u1eefng th\u1eed th\u00e1ch nh\u01b0 v\u1eady. M\u1ed9t \u0110\u1ec1 B\u00e0i To\u00e1n g\u00e2y tranh c\u00e3i c\u00f3 th\u1ec3 l\u00e0 c\u01a1 h\u1ed9i \u0111\u1ec3 khuy\u1ebfn kh\u00edch s\u1ef1 s\u00e1ng t\u1ea1o v\u00e0 t\u01b0 duy \u0111a chi\u1ec1u, nh\u01b0ng c\u0169ng c\u00f3 nguy c\u01a1 l\u00e0m m\u1ea5t \u0111i \u0111\u1ed9ng l\u1ef1c h\u1ecdc t\u1eadp n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c h\u01b0\u1edbng d\u1eabn \u0111\u00fang c\u00e1ch.<\/p>\n

Ph\u1ee5 huynh v\u00e0 gi\u00e1o vi\u00ean c\u1ea7n th\u1eadn tr\u1ecdng h\u01a1n trong vi\u1ec7c \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 ph\u00f9 h\u1ee3p c\u1ee7a c\u00e1c b\u00e0i to\u00e1n n\u00e0y v\u1edbi tr\u00ecnh \u0111\u1ed9 v\u00e0 n\u0103ng l\u1ef1c c\u1ee7a t\u1eebng h\u1ecdc sinh. \u0110\u1ed3ng th\u1eddi, c\u1ea7n t\u1ea1o ra m\u1ed9t m\u00f4i tr\u01b0\u1eddng h\u1ecdc t\u1eadp m\u00e0 \u1edf \u0111\u00f3, m\u1ed7i sai l\u1ea7m \u0111\u1ec1u l\u00e0 c\u01a1 h\u1ed9i \u0111\u1ec3 h\u1ecdc h\u1ecfi ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 l\u00fd do \u0111\u1ec3 n\u1ea3n l\u00f2ng.<\/p>\n

\u0110\u1ec1 B\u00e0i To\u00e1n: C\u1ea9n Tr\u1ecdng V\u1edbi Nh\u1eefng Th\u00e1ch \u0110\u1ed1<\/h3>\n

Trong th\u1eddi gian g\u1ea7n \u0111\u00e2y, m\u1ed9t b\u00e0i to\u00e1n \u0111\u00e3 g\u00e2y ra nhi\u1ec1u tranh c\u00e3i trong c\u1ed9ng \u0111\u1ed3ng ph\u1ee5 huynh. Nhi\u1ec1u ng\u01b0\u1eddi cho r\u1eb1ng \u0111\u1ec1 b\u00e0i c\u00f3 t\u00ednh th\u00e1ch \u0111\u1ed1 v\u00e0 “l\u1eeba ph\u1ec9nh” tr\u1ebb em, b\u1edfi d\u1eef li\u1ec7u \u0111\u01b0a ra kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7 v\u00e0 chi ti\u1ebft. \u0110i\u1ec1u n\u00e0y d\u1ec5 khi\u1ebfn c\u00e1c em b\u1ecf qua nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng, d\u1eabn \u0111\u1ebfn vi\u1ec7c gi\u1ea3i sai ho\u1eb7c kh\u00f4ng th\u1ec3 gi\u1ea3i \u0111\u01b0\u1ee3c.<\/p>\n

Vi\u1ec7c ph\u00e1t tri\u1ec3n t\u01b0 duy cho tr\u1ebb th\u00f4ng qua c\u00e1c b\u00e0i to\u00e1n l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft v\u00e0 t\u00edch c\u1ef1c. Tuy nhi\u00ean, khi m\u1ed9t \u0111\u1ec1 b\u00e0i tr\u1edf n\u00ean qu\u00e1 l\u1eaft l\u00e9o v\u00e0 mang t\u00ednh \u0111\u00e1nh \u0111\u1ed1 cao, n\u00f3 c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111i s\u1ef1 nhi\u1ec7t t\u00ecnh h\u1ecdc t\u1eadp c\u1ee7a tr\u1ebb. Thay v\u00ec c\u1ea3m th\u1ea5y h\u1ee9ng th\u00fa v\u1edbi vi\u1ec7c kh\u00e1m ph\u00e1 ki\u1ebfn th\u1ee9c m\u1edbi, c\u00e1c em c\u00f3 th\u1ec3 tr\u1edf n\u00ean ch\u00e1n n\u1ea3n ho\u1eb7c m\u1ea5t t\u1ef1 tin v\u00e0o kh\u1ea3 n\u0103ng c\u1ee7a m\u00ecnh.<\/p>\n

C\u00e1c b\u1eadc ph\u1ee5 huynh c\u1ea7n th\u1eadn tr\u1ecdng khi \u0111\u1ed1i m\u1eb7t v\u1edbi nh\u1eefng d\u1ea1ng b\u00e0i to\u00e1n nh\u01b0 v\u1eady.<\/h5>\n

H\u00e3y \u0111\u1ea3m b\u1ea3o r\u1eb1ng con em m\u00ecnh hi\u1ec3u r\u00f5 v\u1ea5n \u0111\u1ec1 tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u gi\u1ea3i quy\u1ebft v\u00e0 khuy\u1ebfn kh\u00edch ch\u00fang \u0111\u1eb7t c\u00e2u h\u1ecfi n\u1ebfu g\u1eb7p kh\u00f3 kh\u0103n. \u0110\u1ed3ng th\u1eddi, h\u00e3y t\u1ea1o m\u00f4i tr\u01b0\u1eddng h\u1ecdc t\u1eadp tho\u1ea3i m\u00e1i \u0111\u1ec3 tr\u1ebb c\u1ea3m th\u1ea5y t\u1ef1 do trong vi\u1ec7c th\u1eed nghi\u1ec7m v\u00e0 t\u00ecm t\u00f2i m\u00e0 kh\u00f4ng s\u1ee3 m\u1eafc sai l\u1ea7m.<\/p>\n

\u2014<\/p>\n

### \u0110\u1ec1 B\u00e0i To\u00e1n: Khi S\u1ef1 Th\u00e1ch \u0110\u1ed1 Tr\u1edf Th\u00e0nh R\u00e0o C\u1ea3n<\/p>\n

G\u1ea7n \u0111\u00e2y, m\u1ed9t \u0111\u1ec1 b\u00e0i To\u00e1n \u0111\u00e3 g\u00e2y ra nhi\u1ec1u tranh c\u00e3i trong c\u1ed9ng \u0111\u1ed3ng ph\u1ee5 huynh v\u00e0 gi\u00e1o vi\u00ean.<\/h5>\n

Nhi\u1ec1u ng\u01b0\u1eddi cho r\u1eb1ng \u0111\u1ec1 b\u00e0i n\u00e0y kh\u00f4ng ch\u1ec9 c\u00f3 t\u00ednh th\u00e1ch \u0111\u1ed1 m\u00e0 c\u00f2n mang t\u00ednh “l\u1eeba ph\u1ec9nh” \u0111\u1ed1i v\u1edbi tr\u1ebb em. V\u1ea5n \u0111\u1ec1 n\u1eb1m \u1edf ch\u1ed7 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c \u0111\u01b0a ra kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7 v\u00e0 chi ti\u1ebft, d\u1ec5 khi\u1ebfn tr\u1ebb em b\u1ecf qua nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng.<\/p>\n

\"G\u1ea7n
G\u1ea7n \u0111\u00e2y, m\u1ed9t \u0111\u1ec1 b\u00e0i To\u00e1n \u0111\u00e3 g\u00e2y ra nhi\u1ec1u tranh c\u00e3i trong c\u1ed9ng \u0111\u1ed3ng ph\u1ee5 huynh v\u00e0 gi\u00e1o vi\u00ean.<\/figcaption><\/figure>\n

C\u00e1c b\u1eadc ph\u1ee5 huynh lo ng\u1ea1i r\u1eb1ng, m\u1eb7c d\u00f9 vi\u1ec7c ph\u00e1t tri\u1ec3n t\u01b0 duy cho tr\u1ebb l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft, nh\u01b0ng ki\u1ec3u \u0111\u1ec1 l\u1eaft l\u00e9o v\u00e0 \u0111\u00e1nh \u0111\u1ed1 nh\u01b0 v\u1eady c\u00f3 th\u1ec3 l\u00e0m m\u1ea5t \u0111i s\u1ef1 nhi\u1ec7t t\u00ecnh h\u1ecdc t\u1eadp c\u1ee7a c\u00e1c em. Khi m\u1ed9t b\u00e0i to\u00e1n tr\u1edf n\u00ean qu\u00e1 ph\u1ee9c t\u1ea1p ho\u1eb7c thi\u1ebfu r\u00f5 r\u00e0ng, n\u00f3 kh\u00f4ng ch\u1ec9 th\u00e1ch th\u1ee9c kh\u1ea3 n\u0103ng gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 c\u1ee7a h\u1ecdc sinh m\u00e0 c\u00f2n c\u00f3 th\u1ec3 t\u1ea1o ra c\u1ea3m gi\u00e1c th\u1ea5t v\u1ecdng ho\u1eb7c ch\u00e1n n\u1ea3n.<\/p>\n

\u0110i\u1ec1u quan tr\u1ecdng l\u00e0 ch\u00fang ta c\u1ea7n c\u00e2n nh\u1eafc gi\u1eefa vi\u1ec7c k\u00edch th\u00edch t\u01b0 duy s\u00e1ng t\u1ea1o v\u00e0 vi\u1ec7c \u0111\u1eb7t ra nh\u1eefng tr\u1edf ng\u1ea1i kh\u00f4ng c\u1ea7n thi\u1ebft. M\u1ed9t m\u00f4i tr\u01b0\u1eddng h\u1ecdc t\u1eadp l\u00fd t\u01b0\u1edfng l\u00e0 n\u01a1i m\u00e0 tr\u1ebb em c\u1ea3m th\u1ea5y \u0111\u01b0\u1ee3c khuy\u1ebfn kh\u00edch kh\u00e1m ph\u00e1 v\u00e0 th\u1eed nghi\u1ec7m, ch\u1ee9 kh\u00f4ng ph\u1ea3i b\u1ecb \u00e1p l\u1ef1c b\u1edfi nh\u1eefng c\u00e2u h\u1ecfi \u0111\u00e1nh \u0111\u1ed1 kh\u00f3 hi\u1ec3u.<\/p>","protected":false},"excerpt":{"rendered":"

\u0110\u1ec1 b\u00e0i to\u00e1n g\u00e2y tranh c\u00e3i d\u1eef d\u1ed9i \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng tr\u00ean m\u1ea1ng x\u00e3 h\u1ed9i, thu h\u00fat s\u1ef1 ch\u00fa \u00fd c\u1ee7a nhi\u1ec1u ng\u01b0\u1eddi t\u1eeb h\u1ecdc sinh, gi\u00e1o vi\u00ean cho \u0111\u1ebfn c\u00e1c chuy\u00ean gia to\u00e1n h\u1ecdc. M\u1eb7c d\u00f9 tho\u1ea1t nh\u00ecn c\u00f3 v\u1ebb \u0111\u01a1n gi\u1ea3n, nh\u01b0ng \u0111\u1ec1 b\u00e0i n\u00e0y l\u1ea1i ch\u1ee9a \u0111\u1ef1ng nh\u1eefng y\u1ebfu t\u1ed1 ph\u1ee9c t\u1ea1p khi\u1ebfn nhi\u1ec1u ng\u01b0\u1eddi ph\u1ea3i \u0111au \u0111\u1ea7u suy ngh\u0129. V\u1ea5n \u0111\u1ec1 n\u1eb1m \u1edf ch\u1ed7 c\u00e1ch gi\u1ea3i th\u00edch v\u00e0 ti\u1ebfp c\u1eadn b\u00e0i to\u00e1n kh\u00f4ng \u0111\u01b0\u1ee3c th\u1ed1ng nh\u1ea5t, d\u1eabn \u0111\u1ebfn nhi\u1ec1u c\u00e1ch hi\u1ec3u kh\u00e1c nhau. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 g\u00e2y kh\u00f3 kh\u0103n cho vi\u1ec7c t\u00ecm ra \u0111\u00e1p \u00e1n ch\u00ednh x\u00e1c m\u00e0 c\u00f2n t\u1ea1o ra nh\u1eefng cu\u1ed9c tranh lu\u1eadn n\u1ea3y l\u1eeda v\u1ec1 ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3ng d\u1ea1y v\u00e0 \u0111\u00e1nh gi\u00e1 n\u0103ng l\u1ef1c t\u01b0 duy c\u1ee7a h\u1ecdc sinh. Ng\u01b0\u1eddi ta c\u1ea7n th\u1eadn tr\u1ecdng khi \u0111\u1ed1i di\u1ec7n v\u1edbi nh\u1eefng \u0111\u1ec1 b\u00e0i nh\u01b0 th\u1ebf n\u00e0y. Kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 t\u00ecm ra \u0111\u00e1p \u00e1n \u0111\u00fang hay sai, m\u00e0 c\u00f2n ph\u1ea3i xem x\u00e9t k\u1ef9 l\u01b0\u1ee1ng c\u00e1c kh\u00eda c\u1ea1nh kh\u00e1c nh\u01b0 m\u1ee5c \u0111\u00edch gi\u00e1o d\u1ee5c v\u00e0 kh\u1ea3 n\u0103ng \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf. H\u00e3y nh\u1edb r\u1eb1ng, m\u1ed7i b\u00e0i to\u00e1n \u0111\u1ec1u c\u00f3 th\u1ec3 mang l\u1ea1i m\u1ed9t b\u00e0i h\u1ecdc qu\u00fd gi\u00e1 n\u1ebfu ch\u00fang ta bi\u1ebft c\u00e1ch nh\u00ecn nh\u1eadn \u0111\u00fang \u0111\u1eafn v\u00e0 c\u00f4ng b\u1eb1ng. To\u00e1n h\u1ecdc kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 nh\u1eefng con s\u1ed1 v\u00e0 ph\u00e9p t\u00ednh kh\u00f4 khan. \u1ea8n s\u00e2u trong \u0111\u00f3 l\u00e0 nh\u1eefng c\u00e2u h\u1ecfi t\u01b0 duy logic \u0111\u1ea7y th\u00e1ch th\u1ee9c, \u0111\u00f2i h\u1ecfi ng\u01b0\u1eddi h\u1ecdc ph\u1ea3i c\u00f3 kh\u1ea3 n\u0103ng quan s\u00e1t tinh t\u1ebf v\u00e0 li\u00ean t\u01b0\u1edfng ch\u1eb7t ch\u1ebd. \u0110\u1eb7c bi\u1ec7t, nhi\u1ec1u \u0111\u1ec1 b\u00e0i To\u00e1n th\u01b0\u1eddng c\u00e0i c\u1eafm nh\u1eefng d\u1eef li\u1ec7u “b\u1eaby” khi\u1ebfn ng\u01b0\u1eddi gi\u1ea3i d\u1ec5 m\u1eafc sai l\u1ea7m n\u1ebfu kh\u00f4ng suy ngh\u0129 k\u1ef9 c\u00e0ng. \u0110\u1ed1i m\u1eb7t v\u1edbi c\u00e1c \u0111\u1ec1 b\u00e0i To\u00e1n ph\u1ee9c t\u1ea1p, m\u1ed9t tr\u00ed tu\u1ec7 s\u1eafc b\u00e9n c\u00f9ng v\u1edbi IQ cao th\u01b0\u1eddng \u0111\u01b0\u1ee3c xem l\u00e0 l\u1ee3i th\u1ebf l\u1edbn. Tuy nhi\u00ean, \u0111i\u1ec1u quan tr\u1ecdng h\u01a1n c\u1ea3 l\u00e0 s\u1ef1 ki\u00ean nh\u1eabn v\u00e0 kh\u1ea3 n\u0103ng ph\u00e2n t\u00edch v\u1ea5n \u0111\u1ec1 m\u1ed9t c\u00e1ch to\u00e0n di\u1ec7n. Nh\u1eefng b\u1eaby trong c\u00e1c b\u00e0i to\u00e1n \u0111\u00f4i khi r\u1ea5t kh\u00f3 ph\u00e1t hi\u1ec7n ngay t\u1eeb \u0111\u1ea7u, y\u00eau c\u1ea7u ch\u00fang ta ph\u1ea3i b\u00ecnh t\u0129nh \u0111\u00e1nh gi\u00e1 t\u1eebng chi ti\u1ebft nh\u1ecf nh\u1ea5t tr\u01b0\u1edbc khi \u0111\u01b0a ra \u0111\u00e1p \u00e1n cu\u1ed1i c\u00f9ng. V\u00ec v\u1eady, khi ti\u1ebfp c\u1eadn v\u1edbi c\u00e1c b\u00e0i to\u00e1n kh\u00f3 kh\u0103n n\u00e0y, h\u00e3y lu\u00f4n gi\u1eef cho m\u00ecnh m\u1ed9t c\u00e1i \u0111\u1ea7u l\u1ea1nh v\u00e0 \u0111\u1eebng v\u1ed9i v\u00e3 k\u1ebft lu\u1eadn. H\u00e3y nh\u1edb r\u1eb1ng m\u1ed7i con s\u1ed1 hay d\u1eef ki\u1ec7n \u0111\u1ec1u c\u00f3 th\u1ec3 mang \u0111\u1ebfn manh m\u1ed1i quan tr\u1ecdng \u0111\u1ec3 th\u00e1o g\u1ee1 v\u1ea5n \u0111\u1ec1. H\u00e3y c\u1ea3nh gi\u00e1c v\u1edbi nh\u1eefng th\u00f4ng tin t\u01b0\u1edfng ch\u1eebng nh\u01b0 r\u00f5 r\u00e0ng nh\u01b0ng th\u1ef1c ch\u1ea5t l\u1ea1i che gi\u1ea5u nhi\u1ec1u \u0111i\u1ec1u b\u1ea5t ng\u1edd ph\u00eda sau! Khi nghe qua \u0111\u1ec1 b\u00e0i to\u00e1n n\u00e0y, nhi\u1ec1u ng\u01b0\u1eddi c\u00f3 th\u1ec3 ngh\u0129 r\u1eb1ng \u0111\u00e2y l\u00e0 m\u1ed9t c\u00e2u h\u1ecfi \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 d\u00e0ng gi\u1ea3i quy\u1ebft. Tuy nhi\u00ean, th\u1ef1c t\u1ebf \u0111\u00e3 ch\u1ee9ng minh \u0111i\u1ec1u ng\u01b0\u1ee3c l\u1ea1i khi n\u00f3 tr\u1edf th\u00e0nh ch\u1ee7 \u0111\u1ec1 g\u00e2y tranh c\u00e3i k\u1ecbch li\u1ec7t tr\u00ean m\u1ea1ng x\u00e3 h\u1ed9i Trung Qu\u1ed1c. \u0110\u1ec1 b\u00e0i: “Ti\u1ec3u Minh tham gia m\u1ed9t cu\u1ed9c thi ch\u1ea1y \u1edf tr\u01b0\u1eddng. Tr\u00ean \u0111\u01b0\u1eddng \u0111ua v\u00f2ng tr\u00f2n, c\u00f3 5 ng\u01b0\u1eddi ph\u00eda tr\u01b0\u1edbc Ti\u1ec3u Minh v\u00e0 5 ng\u01b0\u1eddi ph\u00eda sau, t\u1ed5ng c\u1ed9ng c\u00f3 bao nhi\u00eau ng\u01b0\u1eddi?” tho\u1ea1t nh\u00ecn kh\u00f4ng h\u1ec1 kh\u00f3 nh\u1eb1n. Tuy nhi\u00ean, ch\u00ednh s\u1ef1 \u0111\u01a1n gi\u1ea3n \u0111\u00f3 l\u1ea1i khi\u1ebfn nhi\u1ec1u ng\u01b0\u1eddi r\u01a1i v\u00e0o b\u1eaby t\u01b0 duy. M\u1ed9t s\u1ed1 ng\u01b0\u1eddi v\u1ed9i v\u00e0ng k\u1ebft lu\u1eadn r\u1eb1ng ch\u1ec9 c\u1ea7n c\u1ed9ng s\u1ed1 l\u01b0\u1ee3ng ng\u01b0\u1eddi ph\u00eda tr\u01b0\u1edbc v\u00e0 ph\u00eda sau Ti\u1ec3u Minh v\u1edbi ch\u00ednh c\u1eadu \u1ea5y l\u00e0 ra \u0111\u00e1p \u00e1n. Nh\u01b0ng n\u1ebfu suy ngh\u0129 k\u1ef9 h\u01a1n v\u1ec1 c\u1ea5u tr\u00fac c\u1ee7a m\u1ed9t \u0111\u01b0\u1eddng \u0111ua v\u00f2ng tr\u00f2n, ta s\u1ebd th\u1ea5y v\u1ea5n \u0111\u1ec1 ph\u1ee9c t\u1ea1p h\u01a1n th\u1ebf. \u0110i\u1ec1u n\u00e0y nh\u1eafc nh\u1edf ch\u00fang ta v\u1ec1 t\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c \u0111\u1ecdc k\u1ef9 \u0111\u1ec1 b\u00e0i v\u00e0 hi\u1ec3u r\u00f5 b\u1ea3n ch\u1ea5t v\u1ea5n \u0111\u1ec1 tr\u01b0\u1edbc khi \u0111\u01b0a ra l\u1eddi gi\u1ea3i cu\u1ed1i c\u00f9ng. \u0110\u00f4i khi nh\u1eefng c\u00e2u h\u1ecfi t\u01b0\u1edfng ch\u1eebng nh\u01b0 \u0111\u01a1n gi\u1ea3n l\u1ea1i ch\u1ee9a \u0111\u1ef1ng nh\u1eefng y\u1ebfu t\u1ed1 \u0111\u00e1nh l\u1eeba t\u01b0 duy m\u00e0 n\u1ebfu kh\u00f4ng c\u1ea9n th\u1eadn, ta r\u1ea5t d\u1ec5 m\u1eafc ph\u1ea3i sai l\u1ea7m c\u01a1 b\u1ea3n. \u2014 M\u1ed9t b\u00e0i To\u00e1n t\u01b0\u1edfng ch\u1eebng \u0111\u01a1n gi\u1ea3n nh\u01b0ng l\u1ea1i g\u00e2y ra kh\u00f4ng \u00edt tranh c\u00e3i tr\u00ean c\u00e1c di\u1ec5n \u0111\u00e0n m\u1ea1ng Trung Qu\u1ed1c. \u0110\u1ec1 b\u00e0i nh\u01b0 sau: “Ti\u1ec3u Minh tham gia m\u1ed9t cu\u1ed9c thi ch\u1ea1y \u1edf tr\u01b0\u1eddng. Tr\u00ean \u0111\u01b0\u1eddng \u0111ua v\u00f2ng tr\u00f2n, c\u00f3 5 ng\u01b0\u1eddi ph\u00eda tr\u01b0\u1edbc Ti\u1ec3u Minh v\u00e0 5 ng\u01b0\u1eddi ph\u00eda sau, t\u1ed5ng c\u1ed9ng c\u00f3 bao nhi\u00eau ng\u01b0\u1eddi?” Nghe qua th\u00ec c\u00f3 v\u1ebb d\u1ec5 d\u00e0ng, nh\u01b0ng ch\u00ednh s\u1ef1 \u0111\u01a1n gi\u1ea3n n\u00e0y l\u1ea1i khi\u1ebfn nhi\u1ec1u ng\u01b0\u1eddi nh\u1ea7m l\u1eabn. Khi \u0111\u1ed1i m\u1eb7t v\u1edbi nh\u1eefng \u0111\u1ec1 b\u00e0i nh\u01b0 th\u1ebf n\u00e0y, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i \u0111\u1ecdc k\u1ef9 v\u00e0 ph\u00e2n t\u00edch t\u1eebng chi ti\u1ebft. C\u00e2u h\u1ecfi kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 ph\u00e9p t\u00ednh c\u1ed9ng m\u00e0 c\u00f2n y\u00eau c\u1ea7u kh\u1ea3 n\u0103ng t\u01b0 duy logic v\u00e0 h\u00ecnh dung t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, c\u1ea7n ch\u00fa \u00fd r\u1eb1ng Ti\u1ec3u Minh c\u0169ng n\u1eb1m trong s\u1ed1 nh\u1eefng ng\u01b0\u1eddi \u0111ang ch\u1ea1y \u0111ua. V\u00ec v\u1eady, c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang s\u1ebd kh\u00f4ng ch\u1ec9 d\u1ef1a v\u00e0o ph\u00e9p t\u00ednh s\u01a1 s\u00e0i m\u00e0 ph\u1ea3i c\u00e2n nh\u1eafc \u0111\u1ebfn v\u1ecb tr\u00ed c\u1ee7a Ti\u1ec3u Minh trong t\u1ed5ng s\u1ed1 v\u1eadn \u0111\u1ed9ng vi\u00ean. \u0110\u1ec1 B\u00e0i To\u00e1n n\u00e0y l\u00e0 m\u1ed9t v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh cho th\u1ea5y r\u1eb1ng \u0111\u00f4i khi nh\u1eefng g\u00ec ch\u00fang ta cho l\u00e0 hi\u1ec3n nhi\u00ean l\u1ea1i c\u1ea7n \u0111\u01b0\u1ee3c xem x\u00e9t k\u1ef9 l\u01b0\u1ee1ng h\u01a1n \u0111\u1ec3 tr\u00e1nh m\u1eafc sai l\u1ea7m. H\u00e3y lu\u00f4n c\u1ea9n th\u1eadn v\u1edbi c\u00e1c chi ti\u1ebft nh\u1ecf nh\u1ea5t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea1n hi\u1ec3u r\u00f5 v\u1ea5n \u0111\u1ec1 tr\u01b0\u1edbc khi \u0111\u01b0a ra k\u1ebft lu\u1eadn cu\u1ed1i c\u00f9ng. Trong m\u1ed9t b\u00e0i to\u00e1n t\u01b0\u1edfng ch\u1eebng \u0111\u01a1n gi\u1ea3n, khi em h\u1ecdc sinh \u0111\u01b0a ra \u0111\u00e1p \u00e1n 1 + 5 + 5 = 11, c\u1ea3 gia \u0111\u00ecnh \u0111\u1ec1u \u0111\u1ed3ng t\u00ecnh v\u1edbi k\u1ebft qu\u1ea3 n\u00e0y. Tuy nhi\u00ean, th\u1ea7y gi\u00e1o l\u1ea1i cho r\u1eb1ng \u0111\u00e1p \u00e1n \u0111\u00f3 sai. \u0110i\u1ec1u n\u00e0y khi\u1ebfn ph\u1ee5 huynh b\u0103n kho\u0103n v\u00e0 quy\u1ebft \u0111\u1ecbnh h\u1ecfi l\u1ea1i th\u1ea7y gi\u00e1o \u0111\u1ec3 t\u00ecm hi\u1ec3u r\u00f5 h\u01a1n. Th\u1ea7y gi\u00e1o gi\u1ea3i th\u00edch r\u1eb1ng do b\u00e0i to\u00e1n \u0111\u01b0\u1ee3c \u0111\u1eb7t trong b\u1ed1i c\u1ea3nh c\u1ee7a m\u1ed9t cu\u1ed9c \u0111ua v\u00f2ng tr\u00f2n kh\u00e9p k\u00edn, n\u1ebfu l\u1ea5y Ti\u1ec3u Minh l\u00e0m m\u1ed1c th\u00ec s\u1ed1 ng\u01b0\u1eddi<\/p>","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[7],"tags":[],"class_list":["post-13291","post","type-post","status-publish","format-standard","hentry","category-toddlers"],"yoast_head":"\n\u0110\u1ec1 B\u00e0i To\u00e1n 1 + 5 + 5 = 11: Hi\u1ec3u \u0110\u00fang Tr\u00e1nh B\u1ee9c X\u00fac - 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