Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n
1 n\u0103m c\u00f3 bao nhi\u00eau tu\u1ea7n, qu\u00fd, gi\u1edd, ph\u00fat, gi\u00e2y l\u00e0 c\u00e2u h\u1ecfi m\u00e0 Vietlearn.org nh\u1eadn \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u trong th\u1eddi gian qua. \u0110\u1ec3 c\u00f3 c\u00e2u tr\u1ea3 l\u1eddi ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ea7y \u0111\u1ee7 nh\u1ea5t, qu\u00fd b\u1ea1n \u0111\u1ecdc h\u00e3y theo d\u00f5i nh\u1eefng n\u1ed9i dung trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n\n\n\n
1 n\u0103m c\u00f3 bao nhi\u00eau tu\u1ea7n, qu\u00fd, ng\u00e0y, gi\u1edd, gi\u00e2y ?<\/p>\n\n\n\n
M\u1ed9t n\u0103m c\u00f3 bao nhi\u00eau qu\u00fd?<\/p>\n\n\n\n
Qu\u00fd l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng th\u1eddi gian \u0111\u1ec3 ch\u1ec9 kho\u1ea3ng th\u1eddi gian b\u1eb1ng 3 th\u00e1ng. M\u1ed9t qu\u00fd b\u1eb1ng 3 th\u00e1ng \u0111\u01b0\u1ee3c t\u00ednh t\u1eeb th\u00e1ng 1 tr\u1edf \u0111i. M\u1ed9t n\u0103m s\u1ebd c\u00f3 12 th\u00e1ng\/3 = 4 qu\u00fd. Nh\u01b0 v\u1eady, 1 n\u0103m c\u00f3 4 qu\u00fd, h\u1ebft 4 qu\u00fd l\u00e0 h\u1ebft 1 n\u0103m.<\/p>\n\n\n\n
Qu\u00fd 1 t\u1eeb th\u00e1ng 1 \u0111\u1ebfn th\u00e1ng 3<\/p>\n\n\n\n
Qu\u00fd 2 t\u1eeb th\u00e1ng 4 \u0111\u1ebfn th\u00e1ng 6<\/p>\n\n\n\n
Qu\u00fd 3 t\u1eeb th\u00e1ng 7 \u0111\u1ebfn th\u00e1ng 9<\/p>\n\n\n\n
Qu\u00fd 4 t\u1eeb th\u00e1ng 10 \u0111\u1ebfn th\u00e1ng 12<\/p>\n\n\n\n
Tu\u1ea7n l\u00e0 m\u1ed9t \u0111\u1ea1i l\u01b0\u1ee3ng li\u00ean quan \u0111\u1ebfn th\u1eddi gian, 1 tu\u1ea7n th\u00ec s\u1ebd c\u00f3 7 ng\u00e0y. Theo l\u1ecbch c\u1ee7a ng\u01b0\u1eddi Trung Qu\u1ed1c x\u01b0a, 1 tu\u1ea7n s\u1ebd c\u00f3 10 ng\u00e0y, v\u00e0 m\u1ed9t th\u00e1ng ch\u1ec9 c\u00f3 3 tu\u1ea7n bao g\u1ed3m th\u01b0\u1ee3ng tu\u1ea7n, trung tu\u1ea7n v\u00e0 h\u1ea1 tu\u1ea7n.<\/p>\n\n\n\n
Theo quy \u0111\u1ecbnh t\u1ea1i Vi\u1ec7t Nam, m\u1ed9t tu\u1ea7n s\u1ebd c\u00f3 7 ng\u00e0y. V\u1eady, m\u1ed9t n\u0103m c\u00f3 bao nhi\u00eau tu\u1ea7n? M\u1ed9t n\u0103m kh\u00f4ng nhu\u1eadn s\u1ebd c\u00f3 365 ng\u00e0y, 1 tu\u1ea7n c\u00f3 7 ng\u00e0y th\u00ec s\u1ebd c\u00f3 365\/7= 52 tu\u1ea7n d\u01b0 1 ng\u00e0y . \u0110\u1ed1i v\u1edbi n\u0103m nhu\u1eadn s\u1ebd c\u00f3 366 ng\u00e0y th\u00ec s\u1ebd c\u00f3 52 tu\u1ea7n d\u01b0 2 ng\u00e0y.<\/p>\n\n\n\n
M\u1ed9t n\u0103m c\u00f3 bao nhi\u00eau ng\u00e0y?<\/p>\n\n\n\n
M\u1ed9t n\u0103m s\u1ebd c\u00f3 365 ng\u00e0y \u0111\u1ed1i v\u1edbi n\u0103m kh\u00f4ng nhu\u1eadn c\u00f2n v\u1edbi n\u0103m nhu\u1eadn th\u00ec s\u1ebd c\u00f3 366 ng\u00e0y. C\u1ee9 4 n\u0103m kh\u00f4ng nhu\u1eadn th\u00ec s\u1ebd l\u00e0 1 n\u0103m nhu\u1eadn. N\u0103m nhu\u1eadn l\u00e0 n\u0103m th\u00e1ng 2 c\u00f3 29 ng\u00e0y.<\/p>\n\n\n\n
S\u1edf d\u0129 c\u00f3 s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a n\u0103m nhu\u1eadn, ng\u00e0y nhu\u1eadn \u0111\u00f3 ch\u00ednh l\u00e0 d\u1ef1a v\u00e0o chu k\u1ef3 quay quanh M\u1eb7t Tr\u1eddi c\u1ee7a Tr\u00e1i \u0110\u1ea5t. N\u1ebfu d\u1ef1a v\u00e0o l\u1ecbch d\u01b0\u01a1ng th\u00ec m\u1ed9t n\u0103m s\u1ebd t\u01b0\u01a1ng \u1ee9ng v\u1edbi 1 chu k\u1ef3 duy nh\u1ea5t l\u00e0 365 ng\u00e0y. D\u1ef1a tr\u00ean k\u1ebft qu\u1ea3 th\u1ef1c t\u1ebf th\u00ec chu k\u1ef3 n\u00e0y s\u1ebd kh\u00f4ng th\u1ec3 ho\u00e0n th\u00e0nh 365 ng\u00e0y.<\/p>\n\n\n\n
Thay v\u00e0o \u0111\u00f3, Tr\u00e1i \u0110\u1ea5t s\u1ebd c\u1ea7n th\u00eam m\u1ed9t kho\u1ea3ng th\u1eddi gian l\u00e0 5 gi\u1edd 48 ph\u00fat 46 gi\u00e2y \u0111\u1ec3 ho\u00e0n th\u00e0nh chu k\u1ef3 n\u00e0y. N\u1ebfu nh\u01b0 b\u1ea1n c\u1ed9ng d\u1ed3n th\u00ec kho\u1ea3ng th\u1eddi gian b\u1ecb thi\u1ebfu n\u00e0y trong 4 n\u0103m s\u1ebd th\u00e0nh 1 ng\u00e0y v\u00e0 \u0111\u00f3 ch\u00ednh l\u00e0 ng\u00e0y 29\/2. Nh\u1eefng n\u0103m c\u00f3 ng\u00e0y 29 v\u00e0o th\u00e1ng 2 s\u1ebd g\u1ecdi n\u0103m \u0111\u00f3 l\u00e0 n\u0103m nhu\u1eadn, c\u00f3 366 ng\u00e0y.<\/p>\n\n\n\n
1 n\u0103m c\u00f3 bao nhi\u00eau ng\u00e0y ch\u1ee7 nh\u1eadt?<\/p>\n\n\n\n
Theo quy \u01b0\u1edbc, 1 tu\u1ea7n s\u1ebd c\u00f3 1 ng\u00e0y ch\u1ee7 nh\u1eadt, m\u1ed9t n\u0103m c\u00f3 52 tu\u1ea7n d\u01b0 1-2 ng\u00e0y th\u00ec s\u1ebd c\u00f3 52 ho\u1eb7c 53 ng\u00e0y ch\u1ee7 nh\u1eadt.<\/p>\n\n\n\n
1 n\u0103m c\u00f3 365 ng\u00e0y (v\u1edbi n\u0103m kh\u00f4ng nhu\u1eadn) v\u00e0 366 ng\u00e0y v\u1edbi n\u0103m nhu\u1eadn; m\u1ed9t ng\u00e0y c\u00f3 24 gi\u1edd. Theo \u0111\u00f3, 1 n\u0103m s\u1ebd c\u00f3 365\u00d724= 8760 gi\u1edd (n\u0103m kh\u00f4ng nhu\u1eadn) v\u00e0 366\u00d724=8784 gi\u1edd.<\/p>\n\n\n\n
1 n\u0103m c\u00f3 bao nhi\u00eau gi\u00e2y?<\/p>\n\n\n\n
1 gi\u1edd s\u1ebd c\u00f3 60 ph\u00fat, 1 ph\u00fat s\u1ebd c\u00f3 60 gi\u00e2y th\u00ec m\u1ed9t n\u0103m s\u1ebd c\u00f3 bao nhi\u00eau gi\u00e2y? 1 n\u0103m c\u00f3 365x24x60x60 = 31.536.000 gi\u00e2y (v\u1edbi n\u0103m kh\u00f4ng nhu\u1eadn) v\u00e0 366x24x60x60=31.622.400 gi\u00e2y.<\/p>\n\n\n\n
1 th\u00e1ng c\u00f3 bao nhi\u00eau tu\u1ea7n, ng\u00e0y, gi\u1edd, ph\u00fat?<\/p>\n\n\n\n
1 th\u00e1ng c\u00f3 bao nhi\u00eau tu\u1ea7n?<\/p>\n\n\n\n
Theo wikipedia, tu\u1ea7n l\u00e0 m\u1ed9t \u0111\u1ea1i l\u01b0\u1ee3ng v\u1ec1 th\u1eddi gian, 1 th\u00e1ng c\u00f3 4 tu\u1ea7n.<\/p>\n\n\n\n
1 th\u00e1ng c\u00f3 bao nhi\u00eau ng\u00e0y?<\/p>\n\n\n\n
D\u1ef1a theo l\u1ecbch d\u01b0\u01a1ng, 1 n\u0103m chia l\u00e0m 12 th\u00e1ng, s\u1ed1 ng\u00e0y trong th\u00e1ng c\u1ed1 \u0111\u1ecbnh qua c\u00e1c n\u0103m. M\u1ed9t n\u0103m c\u00f3 7 th\u00e1ng c\u00f3 31 ng\u00e0y, c\u00f3 4 th\u00e1ng l\u00e0 30 ng\u00e0y v\u00e0 1 th\u00e1ng l\u00e0 28 ng\u00e0y (n\u0103m kh\u00f4ng nhu\u1eadn) ho\u1eb7c 29 ng\u00e0y (n\u0103m nhu\u1eadn), c\u1ee5 th\u1ec3:<\/p>\n\n\n\n
Th\u00e1ng 1, 3, 5, 7, 8, 10, 12 c\u00f3 31 ng\u00e0y<\/p>\n\n\n\n
Th\u00e1ng 2 c\u00f3 28 ho\u1eb7c 29 ng\u00e0y<\/p>\n\n\n\n
Th\u00e1ng 4, 6, 9, 11 c\u00f3 30 ng\u00e0y.<\/p>\n\n\n\n
Theo \u00e2m l\u1ecbch, m\u1ed9t n\u0103m kh\u00f4ng nhu\u1eadn c\u00f3 12 th\u00e1ng, c\u00f2n n\u0103m nhu\u1eadn s\u1ebd c\u00f3 13 th\u00e1ng. S\u1ed1 ng\u00e0y trong m\u1ed7i th\u00e1ng th\u01b0\u1eddng l\u00e0 29 ho\u1eb7c 30 ng\u00e0y. Tuy nhi\u00ean, s\u1ed1 ng\u00e0y trong th\u00e1ng kh\u00f4ng c\u1ed1 \u0111\u1ecbnh qua c\u00e1c n\u0103m n\u00ean r\u1ea5t kh\u00f3 \u0111\u1ec3 c\u00f3 th\u1ec3 th\u1ed1ng k\u00ea m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/p>\n\n\n\n
1 th\u00e1ng c\u00f3 bao nhi\u00eau gi\u1edd?<\/p>\n\n\n\n
M\u1ed9t ng\u00e0y c\u00f3 24 gi\u1edd, n\u00ean m\u1ed9t th\u00e1ng s\u1ebd c\u00f3 30 ng\u00e0y x 24 gi\u1edd = 720 gi\u1edd c\u00f2n v\u1edbi th\u00e1ng c\u00f3 31 ng\u00e0y s\u1ebd c\u00f3 th\u00eam 24 gi\u1edd l\u00e0 744 gi\u1edd. Th\u00e1ng 2 c\u1ee7a n\u0103m kh\u00f4ng nhu\u1eadn c\u00f3 28 ng\u00e0y s\u1ebd c\u00f3 672 gi\u1edd c\u00f2n n\u0103m nhu\u1eadn th\u00ec s\u1ebd c\u00f3 696 gi\u1edd.<\/p>\n\n\n\n
1 th\u00e1ng c\u00f3 bao nhi\u00eau ph\u00fat?<\/p>\n\n\n\n
M\u1ed9t gi\u1edd c\u00f3 60 ph\u00fat, 1 ng\u00e0y c\u00f3 24 gi\u1edd n\u00ean m\u1ed9t ng\u00e0y s\u1ebd c\u00f3 1.440 ph\u00fat. C\u00e1c th\u00e1ng 30 ng\u00e0y s\u1ebd c\u00f3 t\u1ed5ng s\u1ed1 ph\u00fat l\u00e0 30\u00d71.440 = 43.200 ph\u00fat; c\u00f2n th\u00e1ng 31 ng\u00e0y s\u1ebd c\u00f3 44.640 ph\u00fat. Th\u00e1ng 2 kh\u00f4ng nhu\u1eadn s\u1ebd c\u00f3 40.320 ph\u00fat v\u00e0 th\u00e1ng 2 nhu\u1eadn s\u1ebd c\u00f3 41.760 ph\u00fat.<\/p>\n\n\n\n
N\u1ebfu nh\u01b0 c\u00e1c s\u1ed1 li\u1ec7u tr\u00ean khi\u1ebfn b\u1ea1n g\u1eb7p kh\u00f3 kh\u0103n trong qu\u00e1 tr\u00ecnh ghi nh\u1edb, th\u00ec Vietlearn.org s\u1ebd m\u00e1ch b\u1ea1n c\u00e1ch t\u00ednh s\u1ed1 ng\u00e0y trong th\u00e1ng b\u1eb1ng b\u00e0n tay. \u0110\u00e2u ti\u00ean, b\u1ea1n n\u1eafm hai b\u00e0n tay l\u1ea1i, \u00fap xu\u1ed1ng v\u00e0 \u0111\u1eb7t c\u1ea1nh nhau; th\u1ef1c hi\u1ec7n \u0111\u1ebfm l\u1ea7n l\u01b0\u1ee3t t\u1eeb tr\u00e1i qua ph\u1ea3i theo th\u1ee9 t\u1ef1 t\u1eeb tr\u00e1i qua ph\u1ea3i theo th\u1ee9 t\u1ef1 t\u1eeb 1 \u0111\u1ebfn 12 t\u01b0\u01a1ng \u1ee9ng v\u1edbi 12 th\u00e1ng. Kh\u1edbp nh\u00f4 l\u00ean s\u1ebd bi\u1ec3u th\u1ecb cho c\u00e1c th\u00e1ng 31 ng\u00e0y c\u00f2n kh\u1edbp l\u00f5m xu\u1ed1ng hi\u1ec3n th\u1ecb cho c\u00e1c th\u00e1ng 30 ng\u00e0y, th\u00e1ng 2 s\u1ebd n\u1eb1m \u1edf kh\u1edbp l\u00f5m xu\u1ed1ng \u0111\u1ea7u ti\u00ean.<\/p>\n\n\n\n
1 ng\u00e0y c\u00f3 bao nhi\u00eau gi\u1edd, ph\u00fat, gi\u00e2y?<\/p>\n\n\n\n
Nh\u01b0 \u0111\u00e3 th\u00f4ng tin \u1edf tr\u00ean, 1 ng\u00e0y c\u00f3 24 gi\u1edd, 1 ng\u00e0y s\u1ebd c\u00f3 1.440 ph\u00fat, 1 ng\u00e0y c\u00f3 24x60x60 = 86.600 gi\u00e2y.<\/p>\n\n\n\n
V\u1edbi c\u00e1c n\u1ed9i dung th\u00f4ng tin trong b\u00e0i vi\u1ebft \u201c1 n\u0103m c\u00f3 bao nhi\u00eau tu\u1ea7n, qu\u00fd, gi\u1edd, ph\u00fat, gi\u00e2y? C\u00e1ch t\u00ednh\u201d\u201d, mong r\u1eb1ng s\u1ebd gi\u00fap \u00edch b\u1ea1n. Truy c\u1eadp Vietlearn.org \u0111\u1ec3 t\u00ecm hi\u1ec3u nhi\u1ec1u th\u00f4ng tin h\u1eefu \u00edch kh\u00e1c.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn 1 n\u0103m c\u00f3 bao nhi\u00eau tu\u1ea7n, qu\u00fd, gi\u1edd, ph\u00fat, gi\u00e2y l\u00e0 c\u00e2u h\u1ecfi m\u00e0 Vietlearn.org nh\u1eadn \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u trong th\u1eddi gian qua. \u0110\u1ec3 c\u00f3 c\u00e2u tr\u1ea3 l\u1eddi ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ea7y \u0111\u1ee7 nh\u1ea5t, qu\u00fd b\u1ea1n \u0111\u1ecdc h\u00e3y theo d\u00f5i nh\u1eefng n\u1ed9i dung trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y. 1 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[1],"tags":[],"class_list":["post-3904","post","type-post","status-publish","format-standard","hentry","category-general"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/3904","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=3904"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/3904\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=3904"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=3904"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=3904"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}