{"id":1033,"date":"2026-05-13T17:26:59","date_gmt":"2026-05-13T10:26:59","guid":{"rendered":"https:\/\/chuyengiadinh.com.vn\/?p=1033"},"modified":"2026-05-13T17:26:59","modified_gmt":"2026-05-13T10:26:59","slug":"con-gai-mung-ro-khi-duoc-giao-vien-ve-ky-hieu-la-tren-tay-nhung-vua-nhin-thay-ba-me-lap-tuc-bao-canhsat","status":"publish","type":"post","link":"https:\/\/chuyengiadinh.com.vn\/index.php\/2026\/05\/13\/con-gai-mung-ro-khi-duoc-giao-vien-ve-ky-hieu-la-tren-tay-nhung-vua-nhin-thay-ba-me-lap-tuc-bao-canhsat\/","title":{"rendered":"Con g\u00e1i m\u1eebng r\u1ee1 khi \u0111\u01b0\u1ee3c \u2018gi\u00e1o vi\u00ean\u2019 v\u1ebd k\u00fd hi\u1ec7u l\u1ea1 tr\u00ean tay, nh\u01b0ng v\u1eeba nh\u00ecn th\u1ea5y b\u00e0 m\u1eb9 l\u1eadp t\u1ee9c b\u00e1o c\u1ea3nhs\u00e1t"},"content":{"rendered":"

Ng\u01b0\u1eddi m\u1eb9 \u0111\u00e3 t\u1ecf ra r\u1ea5t c\u1ea3nh gi\u00e1c.<\/h2>\n

Theo b\u00e1o \u0110\u1eddi s\u1ed1ng ph\u00e1p lu\u1eadt c\u00f3 b\u00e0i Con g\u00e1i m\u1eebng r\u1ee1 khi \u0111\u01b0\u1ee3c \u201cgi\u00e1o vi\u00ean\u201d v\u1ebd k\u00fd hi\u1ec7u l\u1ea1 tr\u00ean tay, nh\u01b0ng v\u1eeba nh\u00ecn th\u1ea5y b\u00e0 m\u1eb9 l\u1eadp t\u1ee9c b\u00e1o c\u1ea3nh s\u00e1t. N\u1ed9i dung nh\u01b0 sau:<\/strong><\/p>\n

Vi\u1ec7c \u0111\u01b0a con \u0111i h\u1ecdc lu\u00f4n l\u00e0 n\u1ed7i lo th\u01b0\u1eddng tr\u1ef1c c\u1ee7a c\u00e1c b\u1eadc cha m\u1eb9. \u1ede nh\u00e0, ph\u1ee5 huynh c\u00f3 th\u1ec3 gi\u00e1m s\u00e1t con m\u1ecdi l\u00fac, ph\u00e1t hi\u1ec7n k\u1ecbp th\u1eddi m\u1ecdi v\u1ea5n \u0111\u1ec1. Nh\u01b0ng khi \u0111\u1ebfn tr\u01b0\u1eddng, tr\u1ebb ph\u1ea3i ti\u1ebfp x\u00fac v\u1edbi h\u00e0ng tr\u0103m ng\u01b0\u1eddi l\u1ea1, d\u00f9 c\u00f3 camera an ninh th\u00ec c\u0169ng kh\u00f4ng th\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n tuy\u1ec7t \u0111\u1ed1i.<\/p>\n

M\u1edbi \u0111\u00e2y, c\u1ed9ng \u0111\u1ed3ng m\u1ea1ng Trung Qu\u1ed1c d\u1eady s\u00f3ng v\u1edbi c\u00e2u chuy\u1ec7n v\u1ec1 m\u1ed9t h\u00ecnh v\u1ebd l\u1ea1 tr\u00ean tay b\u00e9 g\u00e1i. Sau gi\u1edd tan h\u1ecdc, c\u00f4 b\u00e9 \u0111ang \u0111i b\u1ed9 v\u1ec1 nh\u00e0 c\u00f9ng b\u1ea1n b\u00e8 th\u00ec t\u00ecnh c\u1edd g\u1eb7p m\u1ed9t ng\u01b0\u1eddi ph\u1ee5 n\u1eef t\u1ef1 x\u01b0ng l\u00e0 gi\u00e1o vi\u00ean d\u1ea1y khi\u00eau v\u0169 t\u1ea1i trung t\u00e2m.<\/p>\n

Ng\u01b0\u1eddi n\u00e0y \u0111\u1ec1 ngh\u1ecb c\u00e1c em th\u1eed nh\u1ea3y v\u00e0i \u0111\u1ed9ng t\u00e1c. N\u1ebfu nh\u1ea3y t\u1ed1t, tr\u1ebb s\u1ebd \u0111\u01b0\u1ee3c tham gia l\u1edbp h\u1ecdc mi\u1ec5n ph\u00ed. C\u00e1c b\u00e9 h\u00e0o h\u1ee9ng l\u00e0m theo. Sau \u0111\u00f3, \u201cgi\u00e1o vi\u00ean\u201d ch\u1ecdn 2 em nh\u1ea3y xu\u1ea5t s\u1eafc nh\u1ea5t, v\u1ebd bi\u1ec3u t\u01b0\u1ee3ng l\u1ea1 l\u00ean c\u00e1nh tay v\u00e0 b\u1ea3o r\u1eb1ng mang k\u00fd hi\u1ec7u n\u00e0y \u0111\u1ebfn s\u1ebd nh\u1eadn qu\u00e0.<\/p>\n

C\u00f4 b\u00e9 vui m\u1eebng khoe \u201cph\u1ea7n th\u01b0\u1edfng \u0111\u1eb7c bi\u1ec7t\u201d v\u1edbi m\u1eb9. H\u1ea7u h\u1ebft ph\u1ee5 huynh c\u00f3 th\u1ec3 kh\u00f4ng \u0111\u1ec3 \u00fd, nh\u01b0ng ng\u01b0\u1eddi m\u1eb9 n\u00e0y ki\u00ean tr\u00ec h\u1ecfi han chi ti\u1ebft. Nghe xong, c\u00f4 ho\u1ea3ng h\u1ed1t g\u1ecdi ngay c\u1ea3nh s\u00e1t.<\/p>\n

<\/p>\n

H\u00ecnh v\u1ebd l\u1ea1 tr\u00ean tay b\u00e9 g\u00e1i<\/p>\n

Quan s\u00e1t k\u1ef9 h\u00ecnh v\u1ebd, c\u00f4 nh\u1eadn \u0111\u1ecbnh \u0111\u00e2y l\u00e0 k\u00fd hi\u1ec7u \u0111\u00e1nh d\u1ea5u c\u1ee7a t\u1ed9i ph\u1ea1m bu\u00f4n ng\u01b0\u1eddi \u2013 th\u1ee7 \u0111o\u1ea1n ph\u1ed5 bi\u1ebfn \u0111\u1ec3 theo d\u00f5i v\u00e0 b\u1eaft c\u00f3c tr\u1ebb em. N\u1ebfu kh\u00f4ng ph\u00e1t hi\u1ec7n k\u1ecbp th\u1eddi, con g\u00e1i c\u00f4 r\u1ea5t c\u00f3 th\u1ec3 \u0111\u00e3 b\u1ecb \u0111\u00e1m ng\u01b0\u1eddi x\u1ea5u nh\u1eafm \u0111\u1ebfn.<\/p>\n

Sau khi b\u00e0i \u0111\u0103ng c\u1ee7a b\u00e0 m\u1eb9 \u0111\u01b0\u1ee3c ch\u00fa \u00fd tr\u00ean MXH, ph\u1ea3n \u1ee9ng t\u1eeb c\u01b0 d\u00e2n m\u1ea1ng b\u00f9ng n\u1ed5 ngay l\u1eadp t\u1ee9c:\u00a0\u201cT\u00f4i t\u1eebng th\u1ea5y k\u00fd hi\u1ec7u n\u00e0y trong t\u00e0i li\u1ec7u c\u1ea3nh s\u00e1t!\u201d, \u201cMay m\u00e0 m\u1eb9 ph\u00e1t hi\u1ec7n k\u1ecbp, ch\u1eadm ch\u1ec9 1 ng\u00e0y l\u00e0 m\u1ea5t con!\u201d\u2026\u00a0<\/em>H\u00e0ng lo\u1ea1t ph\u1ee5 huynh chia s\u1ebb h\u00ecnh \u1ea3nh t\u01b0\u01a1ng t\u1ef1 t\u1eeb c\u00e1c v\u1ee5 vi\u1ec7c tr\u01b0\u1edbc \u0111\u00f3, khi\u1ebfn c\u1ea3 c\u1ed9ng \u0111\u1ed3ng r\u00f9ng m\u00ecnh v\u00e0 nh\u1eadn ra th\u1ee7 \u0111o\u1ea1n n\u00e0y ph\u1ed5 bi\u1ebfn h\u01a1n ch\u00fang ta t\u01b0\u1edfng.<\/p>\n

Ch\u00ednh nh\u1eefng chi\u00eau tr\u00f2 nguy hi\u1ec3m nh\u01b0 v\u1eady c\u00e0ng khi\u1ebfn c\u00e1c b\u1eadc cha m\u1eb9 lo l\u1eafng, b\u1edfi khi tr\u1ebb l\u1edbn l\u00ean v\u00e0 ra \u0111\u01b0\u1eddng, kh\u00f4ng ai c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 con 24\/7. B\u1ecdn bu\u00f4n ng\u01b0\u1eddi lu\u00f4n nh\u1eafm v\u00e0o tr\u1ebb em v\u00ec c\u00e1c em c\u00f2n non n\u1edbt, d\u1ec5 tin ng\u01b0\u1eddi l\u1ea1 v\u00e0 ch\u01b0a nh\u1eadn th\u1ee9c \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 nguy hi\u1ec3m. V\u1ee5 vi\u1ec7c n\u00e0y ch\u00ednh l\u00e0 l\u1eddi c\u1ea3nh t\u1ec9nh \u0111\u1eaft gi\u00e1, r\u1eb1ng ch\u1ec9 c\u1ea7n l\u01a1 l\u00e0 1 ph\u00fat, con b\u1ea1n c\u00f3 th\u1ec3 r\u01a1i v\u00e0o t\u1ea7m ng\u1eafm c\u1ee7a k\u1ebb x\u1ea5u.<\/p>\n

Cha m\u1eb9 n\u00ean l\u00e0m g\u00ec \u0111\u1ec3 b\u1ea3o v\u1ec7 con c\u00e1i kh\u1ecfi b\u1ecdn bu\u00f4n ng\u01b0\u1eddi?<\/p>\n

V\u1ee5 vi\u1ec7c tr\u00ean kh\u00f4ng ph\u1ea3i l\u00e0 tr\u01b0\u1eddng h\u1ee3p \u0111\u1ea7u ti\u00ean, nh\u01b0ng n\u00f3 \u0111\u00e3 \u0111\u00e1nh th\u1ee9c h\u00e0ng tri\u1ec7u ph\u1ee5 huynh.\u00a0 Th\u1ee7 \u0111o\u1ea1n c\u1ee7a b\u1ecdn bu\u00f4n ng\u01b0\u1eddi ng\u00e0y c\u00e0ng tinh vi v\u00e0 ai c\u0169ng c\u00f3 nguy c\u01a1 tr\u1edf th\u00e0nh m\u1ee5c ti\u00eau ti\u1ebfp theo b\u1ea5t c\u1ee9 l\u00fac n\u00e0o. \u0110\u1eebng ch\u1edd \u0111\u1ebfn khi s\u1ef1 c\u1ed1 x\u1ea3y ra m\u1edbi h\u1ed1i h\u1eadn!<\/p>\n

B\u1ea1n ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 gi\u1ea3m thi\u1ec3u r\u1ee7i ro ch\u1ec9 v\u1edbi 4 b\u01b0\u1edbc \u0111\u01a1n gi\u1ea3n, d\u1ec5 \u00e1p d\u1ee5ng ngay t\u1eeb h\u00f4m nay:<\/p>\n

1. H\u00e3y ki\u1ec3m tra c\u01a1 th\u1ec3 con h\u00e0ng ng\u00e0y v\u00e0 h\u1ecfi han chi ti\u1ebft t\u1eebng ho\u1ea1t \u0111\u1ed9ng<\/strong><\/p>\n

M\u1ed7i t\u1ed1i, b\u1ea1n ch\u1ec9 c\u1ea7n d\u00e0nh 2 ph\u00fat \u0111\u1ec3 quan s\u00e1t tay ch\u00e2n, qu\u1ea7n \u00e1o c\u1ee7a con xem c\u00f3 h\u00ecnh v\u1ebd l\u1ea1, v\u1ebft b\u1ea7m hay v\u1eadt l\u1ea1 n\u00e0o kh\u00f4ng. Thay v\u00ec h\u1ecfi chung chung \u201cH\u00f4m nay con h\u1ecdc g\u00ec?\u201d, h\u00e3y g\u1eb7ng h\u1ecfi c\u1ee5 th\u1ec3 \u201cCon c\u00f3 g\u1eb7p ai l\u1ea1 kh\u00f4ng? Ai cho con c\u00e1i g\u00ec?\u201d\u2026 90% d\u1ea5u hi\u1ec7u nguy hi\u1ec3m b\u1ecb b\u1ecf qua ch\u1ec9 v\u00ec ph\u1ee5 huynh b\u1eadn r\u1ed9n, nh\u01b0ng ph\u00e1t hi\u1ec7n s\u1edbm ch\u00ednh l\u00e0 ch\u00eca kh\u00f3a c\u1ee9u con k\u1ecbp th\u1eddi. M\u1ed9t th\u00f3i quen nh\u1ecf n\u00e0y c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 con c\u1ea3 \u0111\u1eddi.<\/p>\n

2. D\u1ea1y con c\u1ea3nh gi\u00e1c v\u00e0 nh\u1eadn di\u1ec7n ngay c\u00e1c th\u1ee7 \u0111o\u1ea1n l\u1eeba\u0111\u1ea3o<\/strong><\/p>\n

H\u00e3y h\u01b0\u1edbng d\u1eabn con tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng \u0111i theo ng\u01b0\u1eddi l\u1ea1, kh\u00f4ng nh\u1eadn qu\u00e0 k\u1eb9o t\u1eeb ai v\u00e0 k\u00eau c\u1ee9u th\u1eadt to \u201cC\u1ee9u con v\u1edbi! B\u1ed1 m\u1eb9 \u01a1i!\u201d n\u1ebfu b\u1ecb k\u00e9o \u0111i. Tr\u1ebb t\u1eeb 5-10 tu\u1ed5i r\u1ea5t d\u1ec5 b\u1ecb d\u1ee5 v\u00ec t\u00ednh t\u00f2 m\u00f2, n\u00ean b\u1ea1n c\u1ea7n luy\u1ec7n t\u1eadp h\u00e0ng tu\u1ea7n qua tr\u00f2 ch\u01a1i \u0111\u00f3ng vai ch\u1ec9 10 ph\u00fat m\u1ed7i l\u1ea7n \u0111\u1ec3 con ph\u1ea3n x\u1ea1 t\u1ef1 \u0111\u1ed9ng m\u00e0 kh\u00f4ng c\u1ea7n suy ngh\u0129.<\/p>\n

<\/p>\n

Cha m\u1eb9 c\u1ea7n d\u1ea1y con c\u00e1ch nh\u1eadn d\u1ea1ng k\u1ebb x\u1ea5u v\u00e0 c\u00e1ch ph\u1ea3n \u1ee9ng khi \u0111i l\u1ea1c hay g\u1eb7p v\u1ea5n \u0111\u1ec1<\/p>\n

3. Trang b\u1ecb thi\u1ebft b\u1ecb \u0111\u1ecbnh v\u1ecb v\u00e0 h\u1eb9n tr\u01b0\u1edbc \u0111i\u1ec3m g\u1eb7p c\u1ed1 \u0111\u1ecbnh khi l\u1ea1c \u0111\u01b0\u1eddng<\/strong><\/p>\n

H\u00e3y mua \u0111\u1ed3ng h\u1ed3 GPS ho\u1eb7c v\u00f2ng tay \u0111\u1ecbnh v\u1ecb \u0111\u1ec3 theo d\u00f5i v\u1ecb tr\u00ed con th\u1eddi gian th\u1ef1c qua \u1ee9ng d\u1ee5ng \u0111i\u1ec7n tho\u1ea1i. \u0110\u1ed3ng th\u1eddi d\u1eb7n con r\u1eb1ng n\u1ebfu l\u1ea1c \u0111\u01b0\u1eddng th\u00ec ph\u1ea3i \u0111\u1ee9ng y\u00ean t\u1ea1i c\u1ed5ng tr\u01b0\u1eddng ho\u1eb7c \u0111\u1ecba \u0111i\u1ec3m quen thu\u1ed9c, tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng t\u1ef1 ch\u1ea1y lung tung. B\u1ecdn bu\u00f4n ng\u01b0\u1eddi th\u01b0\u1eddng l\u1ee3i d\u1ee5ng s\u1ef1 ho\u1ea3ng lo\u1ea1n c\u1ee7a tr\u1ebb \u0111\u1ec3 b\u1eaft c\u00f3c, v\u00e0 thi\u1ebft b\u1ecb \u0111\u1ecbnh v\u1ecb s\u1ebd gi\u00fap b\u1ea1n t\u00ecm con trong 5-10 ph\u00fat \u0111\u1ea7u ti\u00ean \u2013 kho\u1ea3ng th\u1eddi gian v\u00e0ng quy\u1ebft \u0111\u1ecbnh s\u1ed1ng c\u00f2n.<\/p>\n

4. B\u00e1o c\u1ea3nh s\u00e1t ngay l\u1eadp t\u1ee9c khi nghi ng\u1edd b\u1ea5t c\u1ee9 d\u1ea5u hi\u1ec7u l\u1ea1 n\u00e0o, kh\u00f4ng \u0111\u01b0\u1ee3c ch\u1ea7n ch\u1eeb<\/strong><\/p>\n

N\u1ebfu ph\u00e1t hi\u1ec7n \u0111i\u1ec1u g\u00ec b\u1ea5t th\u01b0\u1eddng, h\u00e3y g\u1ecdi ngay cho c\u01a1 quan ch\u1ee9c n\u0103ng thay v\u00ec ngh\u0129 \u201cch\u1eafc kh\u00f4ng sao\u201d hay \u201c\u0111\u1ec3 mai xem\u201d. M\u1ed7i ph\u00fat ch\u1eadm tr\u1ec5 s\u1ebd l\u00e0m nguy c\u01a1 t\u0103ng g\u1ea5p \u0111\u00f4i.<\/p>\n

Theo th\u00f4ng tin t\u1eeb b\u00e1o \u0110\u1eddi s\u1ed1ng ph\u00e1p lu\u1eadt \u201cH\u1ed9i cha m\u1eb9 TP.HCM tranh c\u00e3i k\u1ecbch li\u1ec7t B\u00c0I TO\u00c1N l\u1edbp 3 c\u1ef1c \u0111\u01a1n gi\u1ea3n n\u00e0y: \u0110\u00e1p \u00e1n 45 r\u00f5 r\u00e0ng, v\u1eabn b\u1ecb c\u00f4 ch\u1ea5m sai?\u201d, n\u1ed9i dung ch\u00ednh nh\u01b0 sau:<\/strong><\/p>\n

M\u1edbi \u0111\u00e2y, m\u1ed9t \u00f4ng b\u1ed1 \u1edf TP.HCM \u0111\u0103ng t\u1ea3i l\u00ean m\u1ea1ng x\u00e3 h\u1ed9i b\u00e0i to\u00e1n t\u01b0\u1edfng ch\u1eebng \u0111\u01a1n gi\u1ea3n c\u1ee7a con l\u1edbp 3 nh\u01b0ng l\u1ea1i khi\u1ebfn c\u1ed9ng \u0111\u1ed3ng ph\u1ee5 huynh b\u00e0n c\u00e3i s\u00f4i n\u1ed5i.<\/p>\n

\u0110\u1ec1 b\u00e0i nh\u01b0 sau:\u00a0\u201cC\u00f4 Mai chu\u1ea9n b\u1ecb ph\u1ea7n th\u01b0\u1edfng cho c\u00e1c b\u1ea1n h\u1ecdc sinh gi\u1ecfi v\u00e0o d\u1ecbp cu\u1ed1i n\u0103m. M\u1ed7i ph\u1ea7n th\u01b0\u1edfng c\u00f4 \u0111\u1ec3 v\u00e0o 2 quy\u1ec3n truy\u1ec7n v\u00e0 3 quy\u1ec3n v\u1edf. H\u1ecfi 9 ph\u1ea7n th\u01b0\u1edfng nh\u01b0 v\u1eady c\u00f3 bao nhi\u00eau quy\u1ec3n truy\u1ec7n v\u00e0 quy\u1ec3n v\u1edf?\u201d.<\/em><\/p>\n

C\u1eadu b\u00e9 l\u00e0m b\u00e0i:<\/p>\n

S\u1ed1 quy\u1ec3n truy\u1ec7n: 9 \u00d7 2 = 18 (quy\u1ec3n)<\/p>\n

S\u1ed1 quy\u1ec3n v\u1edf: 9 \u00d7 3 = 27 (quy\u1ec3n)<\/p>\n

K\u1ebft lu\u1eadn: \u201cC\u00f3 18 quy\u1ec3n truy\u1ec7n v\u00e0 27 quy\u1ec3n v\u1edf\u201d.<\/p>\n

<\/p>\n

Th\u1ebf nh\u01b0ng c\u00f4 gi\u00e1o l\u1ea1i ch\u1ea5m sai, cho r\u1eb1ng \u0111\u00e1p \u00e1n \u0111\u00fang ph\u1ea3i l\u00e0:<\/p>\n

(2 + 3) \u00d7 9 = 45 (quy\u1ec3n).<\/p>\n

Theo \u00f4ng b\u1ed1, con m\u00ecnh l\u00e0m \u0111\u00fang logic: \u0111\u1ec1 h\u1ecfi \u201cbao nhi\u00eau quy\u1ec3n truy\u1ec7n v\u00e0 quy\u1ec3n v\u1edf\u201d th\u00ec ph\u1ea3i tr\u1ea3 l\u1eddi r\u00f5 t\u1eebng lo\u1ea1i.\u00a0\u201cN\u1ebfu mu\u1ed1n t\u00ednh t\u1ed5ng th\u00ec ph\u1ea3i h\u1ecfi r\u00f5 l\u00e0 \u2018t\u1ed5ng c\u1ed9ng c\u00f3 bao nhi\u00eau quy\u1ec3n truy\u1ec7n v\u00e0 v\u1edf\u2019 ch\u1ee9?\u201d<\/em>, anh vi\u1ebft. Nhi\u1ec1u ph\u1ee5 huynh c\u0169ng \u0111\u1ed3ng t\u00ecnh, cho r\u1eb1ng c\u00e1ch di\u1ec5n \u0111\u1ea1t trong \u0111\u1ec1 ch\u01b0a th\u1eadt ch\u1eb7t ch\u1ebd. C\u00e2u h\u1ecfi c\u00f3 th\u1ec3 hi\u1ec3u theo hai h\u01b0\u1edbng. M\u1ed9t l\u00e0 t\u1ed5ng s\u1ed1 quy\u1ec3n, hai l\u00e0 t\u1eebng lo\u1ea1i. V\u1edbi h\u1ecdc sinh l\u1edbp 2, con \u0111\u1ecdc v\u1eady th\u00ec hi\u1ec3u theo ki\u1ec3u t\u00e1ch ri\u00eang c\u0169ng kh\u00f4ng sai.<\/p>\n

Tuy nhi\u00ean, gi\u00e1o vi\u00ean v\u00e0 nhi\u1ec1u ng\u01b0\u1eddi trong ng\u00e0nh l\u1ea1i c\u00f3 l\u00fd l\u1ebd ri\u00eang: \u0111\u00e2y kh\u00f4ng ph\u1ea3i b\u00e0i to\u00e1n \u0111\u1ebfm \u0111\u01a1n thu\u1ea7n, m\u00e0 l\u00e0 d\u1ea1ng b\u00e0i luy\u1ec7n k\u1ef9 n\u0103ng \u201ct\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c\u201d trong ch\u01b0\u01a1ng tr\u00ecnh To\u00e1n l\u1edbp 3.<\/p>\n

Theo \u0111\u00f3, b\u00e0i to\u00e1n y\u00eau c\u1ea7u h\u1ecdc sinh v\u1eadn d\u1ee5ng quy t\u1eafc \u201ct\u00ednh trong ngo\u1eb7c tr\u01b0\u1edbc, ngo\u00e0i ngo\u1eb7c sau\u201d, n\u00ean c\u00e1ch l\u1eadp bi\u1ec3u th\u1ee9c \u0111\u00fang ph\u1ea3i l\u00e0: (2 + 3) \u00d7 9 = 45 (quy\u1ec3n).<\/p>\n

C\u00f4 gi\u00e1o ch\u1ea5m sai kh\u00f4ng ph\u1ea3i v\u00ec \u201cc\u1ed1 ch\u1ea5p\u201d, m\u00e0 v\u00ec b\u00e0i n\u00e0y \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng hi\u1ec3u ng\u1eef ngh\u0129a to\u00e1n h\u1ecdc, ch\u1ee9 kh\u00f4ng ch\u1ec9 ki\u1ec3m tra k\u1ebft qu\u1ea3. N\u1ebfu h\u1ecdc sinh ch\u1ec9 t\u00e1ch ri\u00eang 9\u00d72 v\u00e0 9\u00d73, b\u00e9 \u0111\u00fang v\u1ec1 m\u1eb7t t\u01b0 duy s\u1ed1 h\u1ecdc, nh\u01b0ng ch\u01b0a v\u1eadn d\u1ee5ng \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c tr\u1ecdng t\u00e2m c\u1ee7a b\u00e0i h\u1ecdc, \u0111\u00f3 l\u00e0 l\u1eadp bi\u1ec3u th\u1ee9c theo t\u00ecnh hu\u1ed1ng.<\/p>\n

M\u1ed9t ph\u1ee5 huynh chia s\u1ebb:\u00a0\u201cN\u1ebfu b\u00e0i n\u00e0y \u1edf l\u1edbp 2, c\u00e1ch l\u00e0m c\u1ee7a b\u00e9 l\u00e0 ho\u00e0n to\u00e0n \u0111\u00fang. Nh\u01b0ng khi \u0111\u00e3 h\u1ecdc sang l\u1edbp 3, y\u00eau c\u1ea7u \u0111\u1ed5i kh\u00e1c. Gi\u00e1o vi\u00ean c\u1ea7n xem h\u1ecdc sinh c\u00f3 hi\u1ec3u v\u00ec sao ph\u1ea3i \u0111\u1eb7t d\u1ea5u ngo\u1eb7c hay kh\u00f4ng. M\u1ee5c ti\u00eau kh\u00f4ng ph\u1ea3i l\u00e0 45 hay 18+27, m\u00e0 l\u00e0 c\u00e1ch t\u01b0 duy\u201d.<\/em><\/p>\n

Ng\u01b0\u1eddi n\u00e0y c\u0169ng cho r\u1eb1ng, vi\u1ec7c ph\u1ee5 huynh th\u1eafc m\u1eafc l\u00e0 \u0111i\u1ec1u d\u1ec5 hi\u1ec3u, b\u1edfi To\u00e1n ti\u1ec3u h\u1ecdc kh\u00f4ng ch\u1ec9 d\u1ea1y t\u00ednh, m\u00e0 d\u1ea1y c\u00e1ch l\u1eadp lu\u1eadn b\u1eb1ng con s\u1ed1. Khi cha m\u1eb9 kh\u00f4ng n\u1eafm \u0111\u01b0\u1ee3c ch\u01b0\u01a1ng tr\u00ecnh, d\u1ec5 r\u01a1i v\u00e0o m\u00e2u thu\u1eabn \u201c\u0111\u00fang ki\u1ec3u ng\u01b0\u1eddi l\u1edbn, sai theo s\u00e1ch gi\u00e1o khoa\u201d.<\/p>\n

Tranh c\u00e3i quanh b\u00e0i to\u00e1n nh\u1ecf n\u00e0y cho th\u1ea5y m\u1ed9t th\u1ef1c t\u1ebf: nhi\u1ec1u b\u00e0i To\u00e1n ti\u1ec3u h\u1ecdc c\u00f3 c\u00e1ch di\u1ec5n \u0111\u1ea1t ch\u01b0a th\u1eadt r\u00f5 r\u00e0ng, khi\u1ebfn h\u1ecdc sinh d\u1ec5 hi\u1ec3u theo ngh\u0129a t\u1ef1 nhi\u00ean, c\u00f2n gi\u00e1o vi\u00ean th\u00ec ch\u1ea5m theo m\u1ee5c ti\u00eau b\u00e0i h\u1ecdc. V\u00ec v\u1eady, vi\u1ec7c th\u1ed1ng nh\u1ea5t c\u00e1ch hi\u1ec3u l\u00e0 r\u1ea5t quan tr\u1ecdng.<\/p>\n

\u201cN\u1ebfu \u0111\u1ec1 mu\u1ed1n ki\u1ec3m tra bi\u1ec3u th\u1ee9c, c\u1ea7n vi\u1ebft: \u2018H\u1ecfi 9 ph\u1ea7n th\u01b0\u1edfng c\u00f3 t\u1ea5t c\u1ea3 bao nhi\u00eau quy\u1ec3n truy\u1ec7n v\u00e0 v\u1edf?\u2019. C\u00f2n n\u1ebfu ch\u1ec9 h\u1ecfi t\u1eebng lo\u1ea1i, n\u00ean ghi r\u00f5: \u2018C\u00f3 bao nhi\u00eau quy\u1ec3n truy\u1ec7n? Bao nhi\u00eau quy\u1ec3n v\u1edf?\u2019. Tr\u1ebb l\u1edbp 3 kh\u00f4ng th\u1ec3 t\u1ef1 ph\u00e2n bi\u1ec7t \u00fd ng\u1eef ph\u00e1p m\u01a1 h\u1ed3 nh\u01b0 ng\u01b0\u1eddi l\u1edbn\u201d<\/em>, m\u1ed9t ng\u01b0\u1eddi g\u00f3p \u00fd.<\/p>\n

C\u00e2u chuy\u1ec7n \u201cb\u00e0i to\u00e1n 9 ph\u1ea7n th\u01b0\u1edfng\u201d h\u00f3a ra l\u1ea1i ph\u1ea3n chi\u1ebfu m\u1ed9t xung \u0111\u1ed9t quen thu\u1ed9c trong gi\u00e1o d\u1ee5c hi\u1ec7n nay: cha m\u1eb9 hi\u1ec3u theo cu\u1ed9c s\u1ed1ng, c\u00f2n nh\u00e0 tr\u01b0\u1eddng d\u1ea1y theo ch\u01b0\u01a1ng tr\u00ecnh. Ng\u01b0\u1eddi l\u1edbn c\u00f3 th\u1ec3 \u0111\u00fang theo kinh nghi\u1ec7m, nh\u01b0ng trong l\u1edbp h\u1ecdc, gi\u00e1o vi\u00ean c\u1ea7n d\u1ea1y \u0111\u00fang tr\u1ecdng t\u00e2m \u0111\u1ec3 r\u00e8n t\u01b0 duy, ch\u1ee9 kh\u00f4ng ch\u1ec9 t\u00ecm \u0111\u00e1p \u00e1n.<\/p>\n

V\u00e0 \u0111\u00f4i khi, \u0111i\u1ec1u quan tr\u1ecdng nh\u1ea5t kh\u00f4ng ph\u1ea3i l\u00e0 \u201cai \u0111\u00fang ai sai\u201d, m\u00e0 l\u00e0 l\u00e0m sao \u0111\u1ec3 c\u1ea3 c\u00f4 v\u00e0 ph\u1ee5 huynh c\u00f9ng nh\u00ecn v\u1ec1 m\u1ed9t h\u01b0\u1edbng, gi\u00fap con h\u1ecdc hi\u1ec3u ch\u1ee9 kh\u00f4ng h\u1ecdc v\u1eb9t. B\u1edfi n\u1ebfu cha m\u1eb9 ch\u1ec9 ch\u0103m ch\u0103m \u201cb\u1ea3o v\u1ec7 \u0111\u00e1p \u00e1n c\u1ee7a con\u201d m\u00e0 qu\u00ean t\u00ecm hi\u1ec3u v\u00ec sao c\u00f4 ch\u1ea5m v\u1eady, th\u00ec m\u1ed7i b\u00e0i to\u00e1n nh\u1ecf l\u1ea1i tr\u1edf th\u00e0nh m\u1ed9t \u201ccu\u1ed9c chi\u1ebfn ng\u01b0\u1eddi l\u1edbn\u201d.<\/p>\n

C\u00f2n v\u1edbi h\u1ecdc sinh, m\u1ed9t ph\u00e9p t\u00ednh c\u00f3 th\u1ec3 sai nh\u01b0ng n\u1ebfu hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1ch suy lu\u1eadn, \u0111\u00f3 m\u1edbi l\u00e0 \u201c\u0111\u00e1p \u00e1n \u0111\u00fang\u201d cho h\u00e0nh tr\u00ecnh h\u1ecdc t\u1eadp d\u00e0i l\u00e2u.<\/p>\n","protected":false},"excerpt":{"rendered":"

Ng\u01b0\u1eddi m\u1eb9 \u0111\u00e3 t\u1ecf ra r\u1ea5t c\u1ea3nh gi\u00e1c. Theo b\u00e1o \u0110\u1eddi s\u1ed1ng ph\u00e1p lu\u1eadt c\u00f3 b\u00e0i Con g\u00e1i m\u1eebng r\u1ee1 khi \u0111\u01b0\u1ee3c \u201cgi\u00e1o vi\u00ean\u201d v\u1ebd k\u00fd hi\u1ec7u l\u1ea1 tr\u00ean tay, nh\u01b0ng v\u1eeba nh\u00ecn th\u1ea5y b\u00e0 m\u1eb9 l\u1eadp t\u1ee9c b\u00e1o c\u1ea3nh s\u00e1t. N\u1ed9i dung nh\u01b0 sau: Vi\u1ec7c \u0111\u01b0a con \u0111i h\u1ecdc lu\u00f4n l\u00e0 n\u1ed7i lo th\u01b0\u1eddng […]<\/p>\n","protected":false},"author":1,"featured_media":1034,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1033","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chua-phan-loai"],"_links":{"self":[{"href":"https:\/\/chuyengiadinh.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/1033","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chuyengiadinh.com.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chuyengiadinh.com.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chuyengiadinh.com.vn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chuyengiadinh.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=1033"}],"version-history":[{"count":1,"href":"https:\/\/chuyengiadinh.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/1033\/revisions"}],"predecessor-version":[{"id":1035,"href":"https:\/\/chuyengiadinh.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/1033\/revisions\/1035"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/chuyengiadinh.com.vn\/index.php\/wp-json\/wp\/v2\/media\/1034"}],"wp:attachment":[{"href":"https:\/\/chuyengiadinh.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=1033"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chuyengiadinh.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=1033"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chuyengiadinh.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=1033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}