Ch\u1ea1m \u0111\u1ec1\u00a0hay ch\u1ea1m trong l\u00f4 \u0111\u1ec1 l\u00e0 g\u00ec l\u00e0 m\u1ed9t c\u00e2u h\u1ecfi m\u00e0 kh\u00f4ng ch\u1ec9 v\u1edbi ng\u01b0\u1eddi m\u1edbi ch\u01a1i m\u00e0 nh\u1eefng ng\u01b0\u1eddi ch\u01a1i l\u00f4 \u0111\u1ec1 l\u00e2u n\u0103m c\u0169ng ch\u01b0a ch\u1eafc \u0111\u00e3 n\u1eafm \u0111\u01b0\u1ee3c \u0111\u1ea7y \u0111\u1ee7 v\u00e0 c\u1ee5 th\u1ec3 nh\u1ea5t. V\u1eady \u0111\u1ec1 ch\u1ea1m l\u00e0 g\u00ec, c\u00f3 t\u1ea5t c\u1ea3 bao nhi\u00eau lo\u1ea1i d\u00e0n \u0111\u1ec1 ch\u1ea1m? C\u00e1c d\u00e0n \u0111\u1ec1 ch\u1ea1m g\u1ed3m nh\u1eefng s\u1ed1 n\u00e0o?<\/p>\n
C\u00f9ng ch\u00fang t\u00f4i t\u00ecm hi\u1ec3u c\u00e1c th\u00f4ng tin \u0111\u1ea7y \u0111\u1ee7 nh\u1ea5t v\u1ec1 \u0111\u1ec1 ch\u1ea1m v\u00e0 c\u00e1ch b\u1eaft ch\u1ea1m \u0111\u1ec1 h\u00e0ng ng\u00e0y, gi\u00fap ng\u01b0\u1eddi ch\u01a1i c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng th\u1ef1c hi\u1ec7n\u00a0soi c\u1ea7u chu\u1ea9n x\u00e1c\u00a0\u0111\u01b0a ra c\u00e1c d\u1ef1 \u0111o\u00e1n k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c nh\u1ea5t.<\/p>\n
1. Ch\u1ea1m \u0111\u1ec1 l\u00e0 g\u00ec?<\/h2>\n
Tr\u01b0\u1edbc khi c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c c\u00e1ch ch\u01a1i \u0111\u1ec1\u00a0 ch\u1ea1m sao cho chu\u1ea9n nh\u1ea5t th\u00ec ng\u01b0\u1eddi ch\u01a1i ph\u1ea3i n\u1eafm ch\u1eafc \u0111\u01b0\u1ee3c ch\u1ea1m \u0111\u1ec1 hay c\u00f2n g\u1ecdi l\u00e0 \u0111\u1ec1 ch\u1ea1m ngh\u0129a l\u00e0 g\u00ec?<\/p>\n
\u0110\u1ec1 ch\u1ea1m \u0111\u01b0\u1ee3c hi\u1ec3u \u0111\u01a1n gi\u1ea3n l\u00e0 nh\u1eefng con s\u1ed1 c\u00f3 \u00edt nh\u1ea5t 1 ch\u1eef s\u1ed1 gi\u1ed1ng nhau,hay c\u00f2n g\u1ecdi l\u00e0 d\u00ednh 1 s\u1ed1.c\u00f3 th\u1ec3 tr\u00f9ng \u0111\u1ea7u ho\u1eb7c tr\u00f9ng \u0111\u00edt.<\/p>\n
<\/p>\n
Ng\u01b0\u1eddi ch\u01a1i l\u01b0u \u00fd, kh\u00e1i ni\u1ec7m ch\u1ea1m ch\u1ec9 \u00e1p d\u1ee5ng v\u1edbi \u0111\u00e1nh \u0111\u1ec1, kh\u00f4ng \u00e1p d\u1ee5ng v\u1edbi c\u00e1ch \u0111\u00e1nh l\u00f4.<\/p>\n
Khi th\u1ef1c hi\u1ec7n c\u00e1ch b\u1eaft ch\u1ea1m \u0111\u1ec1 chu\u1ea9n ng\u01b0\u1eddi ta th\u01b0\u1eddng b\u1eaft d\u00e0n \u0111\u1ec1 ch\u1ea1m \u0111\u1ec3 t\u0103ng t\u1ef7 l\u1ec7 tr\u00fang th\u01b0\u1edfng.<\/p>\n
V\u00ed d\u1ee5: d\u00e0n \u0111\u1ec1 ch\u1ea1m 0: 01, 02, 03, 04, \u2026.<\/p>\n
Ng\u01b0\u1eddi ch\u01a1i c\u00f3 th\u1ec3 tham kh\u1ea3o th\u00eam:\u00a0\u00a0Ph\u01b0\u01a1ng ph\u00e1p t\u00ednh s\u1ed1 \u0111\u1ec1 \u0111\u1ea7u \u0111u\u00f4i mi\u1ec1n B\u1eafc, Trung, Nam t\u1ed1t nh\u1ea5t<\/p>\n
2. D\u00e0n \u0111\u1ec1 ch\u1ea1m g\u1ed3m nh\u1eefng con s\u1ed1 n\u00e0o?<\/h2>\n
Ta c\u00f3 c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean t\u1eeb 0 \u0111\u1ebfn 9 nh\u01b0 v\u1eady t\u01b0\u01a1ng \u0111\u01b0\u01a1ng d\u00e0n \u0111\u1ec1 ch\u1ea1m s\u1ebd bao g\u1ed3m c\u00e1c d\u00e0n ch\u1ea1m \u0111\u1ec1 t\u1eeb 0 \u0111\u1ebfn d\u00e0n \u0111\u1ec1 ch\u1ea1m 9.<\/p>\n
a, \u0110\u1ec1 ch\u1ea1m 0 l\u00e0 g\u00ec?<\/h3>\n
B\u1ed9 \u0111\u1ec1 ch\u1ea1m 0 \u0111\u01b0\u1ee3c hi\u1ec3u \u0111\u01a1n gi\u1ea3n l\u00e0 c\u00e1c s\u1ed1 c\u00f3 2 ch\u1eef s\u1ed1 xu\u1ea5t hi\u1ec7n s\u1ed1 0 \u00edt nh\u1ea5t 1 l\u1ea7n<\/p>\n
D\u00e0n \u0111\u1ec1 ch\u1ea1m 0 g\u1ed3m c\u00e1c s\u1ed1: 00, 01, 10, 02, 20, 03, 30, 04, 40, 05, 50, 06, 60, 07, 70, 08, 80. 09. 90.<\/p>\n
b. \u0110\u1ec1 ch\u1ea1m 1 l\u00e0 g\u00ec?<\/h3>\n
T\u01b0\u01a1ng t\u1ef1 nh\u01b0 tr\u00ean, \u0111\u1ec1 ch\u1ea1m 1 l\u00e0 c\u00e1c s\u1ed1 c\u00f3 s\u1ed1 1 xu\u1ea5t hi\u1ec7n \u00edt nh\u1ea5t 1 l\u1ea7n<\/p>\n
D\u00e0n \u0111\u1ec1 ch\u1ea1m 1 c\u00f3 bao nhi\u00eau s\u1ed1? D\u00e0n \u0111\u1ec1 ch\u1ea1m 1 c\u00f3 t\u1ed5ng 19 s\u1ed1 c\u1ee5 th\u1ec3 g\u1ed3m: 10, 01, 11, 12, 21, 13, 31, 14, 41, 15, 51, 16, 61, 17, 71, 18, 81, 19, 91.<\/p>\n
c. \u0110\u1ec1 ch\u1ea1m 2 l\u00e0 g\u00ec?<\/h3>\n
\u0110\u1ec1 ch\u1ea1m 2 c\u00f3 s\u1ed1 2 xu\u1ea5t hi\u1ec7n \u00edt nh\u1ea5t 1 l\u1ea7n<\/p>\n
D\u00e0n \u0111\u1ec1 ch\u1ea1m 2 g\u1ed3m c\u00e1c s\u1ed1: 20, 02, 21, 12, 22, 23, 32, 24, 42, 25, 52, 26, 62, 27, 72, 28, 82, 29, 92.<\/p>\n
d. D\u00e0n \u0111\u1ec1 ch\u1ea1m 3 l\u00e0 g\u00ec?<\/h3>\n
<\/p>\n
T\u01b0\u01a1ng t\u1ef1 nh\u01b0 tr\u00ean, d\u00e0n \u0111\u1ec1 ch\u1ea1m 3 g\u1ed3m c\u00e1c s\u1ed1: 03, 30, 31, 13, 23, 32, 33, 34, 43, 35, 53, 36, 63, 37, 73, 38, 84, 39, 93.<\/p>\n
e. D\u00e0n \u0111\u1ec1 ch\u1ea1m 4 l\u00e0 g\u00ec?<\/h3>\n
D\u00e0n \u0111\u1ec1 ch\u1ea1m 4 g\u1ed3m bao nhi\u00eau con s\u1ed1? \u0110\u1ec1 ch\u1ea1m 4 c\u00f3 t\u1ed5ng 19 con s\u1ed1 c\u1ee5 th\u1ec3 g\u1ed3m: 04, 40, 14, 41, 24, 42, 34, 43, 44, 45, 45, 64, 46, 74, 47, 48, 84, 49, 94.<\/p>\n
f. D\u00e0n \u0111\u1ec1 ch\u1ea1m 5 l\u00e0 g\u00ec?<\/h3>\n
\u0110\u1ec1 ch\u1ea1m 5 t\u01b0\u01a1ng t\u1ef1 g\u1ed3m c\u00e1c s\u1ed1 c\u00f3 s\u1ed1 5 xu\u1ea5t hi\u1ec7n \u00edt nh\u1ea5t 1 l\u1ea7n trong d\u00e3y.<\/p>\n
D\u00e0n \u0111\u1ec1 ch\u1ea1m 5 g\u1ed3m: 05, 50, 15, 51, 25, 52, 35, 53, 45, 54, 55, 56, 65, 75, 57, 58, 85, 59, 95.<\/p>\n
g. \u0110\u1ec1 ch\u1ea1m 6 l\u00e0 g\u00ec?<\/h3>\n
\u0110\u1ec1 ch\u1ea1m 6 g\u1ed3m c\u00e1c s\u1ed1 2 ch\u1eef s\u1ed1 c\u00f3 \u00edt nh\u1ea5t 1 s\u1ed1 6: 06, 60, 61, 16, 62, 26, 63, 36, 64, 46, 65, 56 , 66, 67, 76, 68, 86, 69, 96.<\/p>\n
h. \u0110\u1ec1 ch\u1ea1m 7 l\u00e0 g\u00ec?<\/h3>\n
D\u00e0n \u0111\u1ec1 ch\u1ea1m 7 g\u1ed3m 19 con s\u1ed1 c\u1ee5 th\u1ec3: 07, 70, 71, 17, 72, 27, 73, 37, 74, 47, 75, 57, 76, 67, 77, 78, 87, 79, 97.<\/p>\n
i. \u0110\u1ec1 ch\u1ea1m 8 l\u00e0 g\u00ec?<\/h3>\n
\u0110\u1ec1 ch\u1ea1m 8 g\u1ed3m: 08, 80, 18, 81, 28, 82, 38, 83, 84, 48, 85, 58, 68, 86, 87, 78, 88, 89, 98<\/p>\n
k. D\u00e0n \u0111\u1ec1 ch\u1ea1m 9 l\u00e0 g\u00ec?<\/h3>\n
D\u00e0n \u0111\u1ec1 ch\u1ea1m 9 g\u1ed3m c\u00e1c s\u1ed1 c\u00f3 \u00edt nh\u1ea5t 1 s\u1ed1 9: 09, 90, 91, 19, 92, 29, 93, 39, 94, 49, 95, 59, 96, 69, 97, 79, 98, 89, 99.<\/p>\n
M\u1ed7i d\u00e0n \u0111\u1ec1 ch\u1ea1m \u0111\u1ec1u c\u00f3 19 ch\u1eef s\u1ed1, vi\u1ec7c b\u1eaft ch\u1ea1m \u0111\u1ec1 chu\u1ea9n h\u00e0ng ng\u00e0y l\u00e0 vi\u1ec7c ng\u01b0\u1eddi ch\u01a1i x\u00e1c \u0111\u1ecbnh \u0111\u1ec1 h\u00f4m nay ch\u1ea1m con g\u00ec \u0111\u1ec3 c\u01b0\u1ee3c cho ng\u00e0y mai ho\u1eb7c trong tu\u1ea7n.<\/p>\n<\/div>\n<\/div>\n