{"id":4078,"date":"2021-11-15T13:41:06","date_gmt":"2021-11-15T06:41:06","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=4078"},"modified":"2021-11-15T13:41:08","modified_gmt":"2021-11-15T06:41:08","slug":"bang-don-vi-do-do-dai-va-cach-doi-don-vi-do-do-dai","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bang-don-vi-do-do-dai-va-cach-doi-don-vi-do-do-dai\/","title":{"rendered":"B\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i v\u00e0 c\u00e1ch \u0111\u1ed5i \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i, b\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i l\u00e0 m\u1ed9t trong nh\u1eefng <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n<\/a> m\u00e0 b\u1ea5t k\u1ef3 ai c\u0169ng s\u1ebd \u0111\u01b0\u1ee3c h\u1ecdc t\u1eeb l\u1edbp 2, l\u1edbp 3. D\u00f9 \u0111\u01b0\u1ee3c ti\u1ebfp x\u00fac kh\u00e1 nhi\u1ec1u nh\u01b0ng v\u1eabn c\u00f3 kh\u00f4ng \u00edt <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> g\u1eb7p ph\u1ea3i kh\u00f3 kh\u0103n trong c\u00e1ch quy \u0111\u1ed5i \u0111\u01a1n v\u1ecb. V\u1eady th\u00ec \u0111\u1eebng b\u1ecf l\u1ee1 c\u00e1c n\u1ed9i dung th\u00f4ng tin c\u00f3 trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y c\u1ee7a Vietlearn.org<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o kho\u1ea3ng c\u00e1ch gi\u1eefa 2 \u0111i\u1ec3m \u0111\u1ec3 l\u00e0m m\u1ed1c so s\u00e1nh v\u1ec1 \u0111\u1ed9 l\u1edbn gi\u1eefa c\u00e1c \u0111\u1ed9 d\u00e0i kh\u00e1c nhau. \u0110\u01a1n v\u1ecb \u0111o chi\u1ec1u d\u00e0i l\u00e0 \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng quan tr\u1ecdng nh\u1ea5t, 1 m\u00e9t \u0111\u00e3 t\u1eebng \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 1\/10.000.000 c\u1ee7a kho\u1ea3ng c\u00e1ch t\u1eeb c\u1ef1c \u0111\u1ebfn x\u00edch \u0111\u1ea1o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i, m\u00e9t vu\u00f4ng v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea3ng \u0111\u1ed5i \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eeb l\u1edbp 2, h\u1ea7u h\u1ebft c\u00e1c b\u1ea1n <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> \u0111\u1ec1u \u0111\u00e3 \u0111\u01b0\u1ee3c h\u1ecdc c\u00e1c \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i c\u01a1 b\u1ea3n nh\u01b0ng ch\u1ec9 d\u1eebng l\u1ea1i \u1edf m\u1ee9c \u0111\u1ed9 l\u00e0m quen v\u00e0 nh\u1eadn bi\u1ebft. T\u1eeb l\u1edbp 3 tr\u1edf \u0111i, c\u00e1c em \u0111\u01b0\u1ee3c ti\u1ebfp x\u00fac nhi\u1ec1u h\u01a1n v\u1edbi c\u00e1c \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng to\u00e1n h\u1ecdc. V\u00e0 b\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i l\u1edbp 3 \u0111\u1ea7u ti\u00ean \u0111\u00f3 l\u00e0:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1edbn h\u01a1n m\u00e9t M\u00e9t Nh\u1ecf h\u01a1n m\u00e9t<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">km hm dam m dm cm mm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 km<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 10 hm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 1000 m<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 hm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 10 dam<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 100 m<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 dam = 10 m 1m<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">=10 dm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">=100 cm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 dm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 10 cm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 100 mm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 cm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 10 mm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 mm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i m\u00e9t vu\u00f4ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong ch\u01b0\u01a1ng tr\u00ecnh h\u1ecdc l\u1edbp 4, b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c h\u1ecdc 2 \u0111\u01a1n v\u1ecb \u0111o di\u1ec7n t\u00edch \u0111\u00f3 l\u00e0 m\u00e9t vu\u00f4ng m\u00e0 milimet vu\u00f4ng trong b\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o di\u1ec7n t\u00edch. V\u00e0 trong <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n<\/a> l\u1edbp 5, s\u1ebd \u0111\u01b0\u1ee3c h\u1ecdc \u0111\u1ea7y \u0111\u1ee7 7 \u0111\u01a1n v\u1ecb. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i m\u00e9t vu\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1edbn h\u01a1n m\u00e9t vu\u00f4ng M\u00e9t vu\u00f4ng Nh\u1ecf h\u01a1n m\u00e9t vu\u00f4ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">km\u00b2 hm\u00b2 dam\u00b2 m\u00b2 dm\u00b2 cm\u00b2 mm\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 km\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 10 hm\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 hm\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 100 dam\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= km\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 dam\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 100 m\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= hm\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1m\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">=100 dm\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= dam\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 dm\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 100 cm\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= m\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 cm\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 100 mm\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= dm\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 mm\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">=cm\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o kh\u1ed1i l\u01b0\u1ee3ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1edbn h\u01a1n ki -lo- gam Ki-lo-gam Nh\u1ecf h\u01a1n ki-lo-gam<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ea5n T\u1ea1 Y\u1ebfn Kg hg dag g<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 t\u1ea5n<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 10 t\u1ea1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 1000 kg<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 t\u1ea1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 10 y\u1ebfn<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 100 kg<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 y\u1ebfn<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 10 kg<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 1000 g<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 kg<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">=10 hg<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">=1000 g<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 hg<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 10 dag<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 100 g<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 dag<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= 10 g<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 g<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch \u0111\u1ecdc \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i l\u1edbn nh\u1ea5t l\u00e0 Ki-l\u00f4-m\u00e9t (km).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01a1n v\u1ecb li\u1ec1n sau Ki-l\u00f4-m\u00e9t (km) l\u00e0 H\u00e9c-t\u00f4-m\u00e9t (hm).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01a1n v\u1ecb li\u1ec1n sau H\u00e9c-t\u00f4-m\u00e9t (hm) l\u00e0 \u0110\u1ec1-ca-m\u00e9t (dam)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01a1n v\u1ecb li\u1ec1n sau \u0110\u1ec1-ca-m\u00e9t (dam) l\u00e0 M\u00e9t (m).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01a1n v\u1ecb li\u1ec1n sau M\u00e9t (m) l\u00e0 \u0110\u1ec1-xi-m\u00e9t (dm).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01a1n v\u1ecb li\u1ec1n sau \u0110\u1ec1-xi-m\u00e9t (dm) l\u00e0 xen-ti-m\u00e9t (cm)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01a1n v\u1ecb li\u1ec1n sau Xen-ti-m\u00e9t (cm) l\u00e0 Mi-li-m\u00e9t (mm)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Micromet l\u00e0 \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i nh\u1ecf nh\u1ea5t, nh\u1ecf h\u01a1n mm.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 \u0111\u1ed5i \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c nh\u1ea5t th\u00ec b\u1ea1n c\u1ea7n ph\u1ea3i hi\u1ec3u r\u00f5 \u0111\u01b0\u1ee3c b\u1ea3n ch\u1ea5t c\u1ee7a ph\u00e9p \u0111\u1ed5i \u0111\u00f3 l\u00e0 g\u00ec. Khi \u0111\u00f3, b\u1ea1n ch\u1ec9 c\u1ea7n d\u1ecbch chuy\u1ec3n d\u1ea5u ph\u1ea9y sang tr\u00e1i ho\u1eb7c sang ph\u1ea3i m\u1ed7i \u0111\u01a1n v\u1ecb li\u1ec1n sau n\u00f3 l\u00e0 m\u1ed9t ch\u1eef s\u1ed1 ho\u1eb7c th\u00eam m\u1ed9t s\u1ed1 0 t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed7i \u0111\u01a1n v\u1ecb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed5i \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i t\u1eeb \u0111\u01a1n v\u1ecb l\u1edbn h\u01a1n sang b\u00e9 h\u01a1n li\u1ec1n k\u1ec1 th\u00ec nh\u00e2n s\u1ed1 \u0111\u00f3 v\u1edbi 10. V\u00ed d\u1ee5: 1km = 10 hm = 100 dam<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi \u0111\u1ed5i \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i t\u1eeb \u0111\u01a1n v\u1ecb nh\u1ecf h\u01a1n sang \u0111\u01a1n v\u1ecb l\u1edbn h\u01a1n li\u1ec1n k\u1ec1 th\u00ec b\u1ea1n chia s\u1ed1 \u0111\u00f3 v\u1edbi 10. V\u00ed d\u1ee5: 30 cm = 3 dm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">=&gt; M\u1ed7i m\u1ed9t \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i li\u1ec1n k\u1ec1 nhau th\u00ec s\u1ebd g\u1ea5p ho\u1eb7c k\u00e9m nhau 10 l\u1ea7n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch h\u1ecdc thu\u1ed9c b\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c h\u1ecdc thu\u1ed9c b\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i kh\u00f4ng ph\u1ea3i \u0111i\u1ec1u d\u1ec5 d\u00e0ng v\u1edbi c\u00e1c em nh\u1ecf nh\u01b0ng c\u00e1c b\u1eadc ph\u1ee5 huynh c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng 1 trong 3 ph\u01b0\u01a1ng ph\u00e1p d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u01b0\u01a1ng ph\u00e1p 1: Ph\u1ed5 nh\u1ea1c cho c\u00e1ch \u0111\u1ecdc \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i, khi c\u00f3 giai \u0111i\u1ec7u kh\u1ea3 n\u0103ng ghi nh\u1edb c\u0169ng s\u1ebd nhanh h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u01b0\u01a1ng ph\u00e1p 2: Ch\u01a1i c\u00e1c tr\u00f2 ch\u01a1i, t\u00ecm ph\u01b0\u01a1ng \u00e1n \u0111\u00fang nh\u1ea5t. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y s\u1ebd kh\u00f4ng b\u1ecb c\u0103ng th\u1eb3ng, t\u1ea1o s\u1ef1 h\u1ee9ng th\u00fa cho c\u00e1c b\u00e9 khi <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc t\u1eadp<\/a> v\u00e0 l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng ghi nh\u1edb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u01b0\u01a1ng ph\u00e1p 3: C\u00e1c b\u1eadc ph\u1ee5 huynh c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng v\u00e0o cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y th\u00f4ng qua vi\u1ec7c h\u1ecfi c\u00e1c b\u00e9 v\u1ec1 \u0111\u1ed9 d\u00e0i c\u1ee7a c\u00e1c v\u1eadt d\u1ee5ng trong gia \u0111\u00ecnh, h\u01b0\u1edbng d\u1eabn c\u00e1c b\u00e9 chuy\u1ec3n \u0111\u1ed9 d\u00e0i \u0111\u00f3 sang nhi\u1ec1u \u0111\u01a1n v\u1ecb kh\u00e1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c d\u1ea1ng b\u00e0i \u00f4n t\u1eadp v\u1ec1 b\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1ea1ng b\u00e0i t\u1eadp 1: \u0110\u1ed5i \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 1: D\u1ef1a v\u00e0o b\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i, \u0111\u1ed5i c\u00e1c \u0111\u01a1n v\u1ecb sau ra m\u00e9t (m)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 km = ?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2 hm = ?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">5 dam = ?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e1p \u00e1n:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 km = 1000m<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2 hm = 200m<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">5 dam = 50m<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 3: \u0110\u1ed5i c\u00e1c \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i sau:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 km = ? dm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">20 dam = ? m<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">100 cm = ?m<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1000 mm = ? cm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e1p \u00e1n:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 km = 100 dm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">20 dam = 200 m<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">100 cm = 1 m<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1000 mm = 100 cm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1ea1ng b\u00e0i t\u1eadp 2: Th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh \u0111\u1ed1i v\u1edbi \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 1: Th\u1ef1c hi\u1ec7n c\u00e1c ph\u00e9p t\u00ednh sau:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">12 km + 7 km = ?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">45 dm \u2013 11 dm =?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">34 mm + 14 mm =?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">8 m x9 =?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">40 cm : 8 = ?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e1p \u00e1n:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">12 km + 7 km = 19 km<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">45 dm \u2013 11 dm = 34 dm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">34 mm + 14 mm =48 mm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">8 m x9 =72 m<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">40 cm : 8 = 5 cm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp 2: R\u00f9a v\u00e0 Th\u1ecf c\u00f9ng thi ch\u1ea1y, r\u00f9a b\u00f2 \u0111\u01b0\u1ee3c 500m, th\u1ecf ch\u1ea1y \u0111\u01b0\u1ee3c 2 km. V\u1eady, t\u1ed5ng qu\u00e3ng \u0111\u01b0\u1eddng Th\u1ecf v\u00e0 R\u00f9a ch\u1ea1y \u0111\u01b0\u1ee3c bao nhi\u00eau?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e1p \u00e1n:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ecf ch\u1ea1y \u0111\u01b0\u1ee3c qu\u00e3ng \u0111\u01b0\u1eddng 2km = 2000 m<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">R\u00f9a b\u00f2 \u0111\u01b0\u1ee3c qu\u00e3ng \u0111\u01b0\u1eddng l\u00e0 500m<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">=&gt; Qu\u00e3ng \u0111\u01b0\u1eddng r\u00f9a v\u00e0 th\u1ecf \u0111i l\u00e0 2000 m + 500 m = 2500 m.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1ea1ng th\u1ee9 3: So s\u00e1nh \u0111\u01a1n v\u1ecb<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp: \u0110i\u1ec1n c\u00e1c d\u1ea5u \u201c&lt;\u201d,\u201d&gt;\u201d,\u201d=\u201d v\u00e0o ch\u1ed7 th\u00edch h\u1ee3p<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">600 mm \u2026 60 cm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">100 m \u2026 15 dam<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">20 dam6m \u2026 5 hm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e1p \u00e1n:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed5i 600 mm = 600 :10 = 60cm =&gt; 600 mm = 60 cm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed5i 100m = 100: 10 = 10 dam &lt; 15 dam =&gt; 100m &lt;15dam<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed5i 20 dam 6 m = 200 m + 6 m = 206 m ; \u0110\u1ed5i 5hm = 500m =&gt; 206 m &lt; 500 m =&gt; 20 dam 6m &lt; 5hm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hy v\u1ecdng, c\u00e1c th\u00f4ng tin tr\u00ean \u0111\u00e2y v\u1ec1 \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i, b\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i s\u1ebd gi\u00fap \u00edch b\u1ea1n. Truy c\u1eadp Vietlearn.org \u0111\u1ec3 t\u00ecm hi\u1ec3u nhi\u1ec1u th\u00f4ng tin chi ti\u1ebft kh\u00e1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn \u0110\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i, b\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i l\u00e0 m\u1ed9t trong nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n m\u00e0 b\u1ea5t k\u1ef3 ai c\u0169ng s\u1ebd \u0111\u01b0\u1ee3c h\u1ecdc t\u1eeb l\u1edbp 2, l\u1edbp 3. D\u00f9 \u0111\u01b0\u1ee3c ti\u1ebfp x\u00fac kh\u00e1 nhi\u1ec1u nh\u01b0ng v\u1eabn c\u00f3 kh\u00f4ng \u00edt h\u1ecdc sinh g\u1eb7p ph\u1ea3i kh\u00f3 kh\u0103n [&hellip;]<\/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-4078","post","type-post","status-publish","format-standard","hentry","category-general"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/4078","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=4078"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/4078\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=4078"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=4078"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=4078"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}