1. 口算下面各题。
$45 + 36 =$ $90 + 40 =$ $1200 - 400 =$
$75 - 38 =$ $150 - 60 =$ $700 + 800 =$
$26 + 52 =$ $70 - 22 =$ $45 - 25 =$
$1000 - 600 =$ $86 - 54 =$ $37 + 58 =$
$45 + 36 =$ $90 + 40 =$ $1200 - 400 =$
$75 - 38 =$ $150 - 60 =$ $700 + 800 =$
$26 + 52 =$ $70 - 22 =$ $45 - 25 =$
$1000 - 600 =$ $86 - 54 =$ $37 + 58 =$
答案
2. 用竖式计算。
$257 + 436 =$ $842 - 751 =$ $638 + 380 =$
$735 - 298 =$ $346 + 589 =$ $902 - 184 =$
$257 + 436 =$ $842 - 751 =$ $638 + 380 =$
$735 - 298 =$ $346 + 589 =$ $902 - 184 =$
答案
3. $294 + 537 + 313 =$ $934 - 586 + 83 =$
答案
4.
(1) 一张电脑桌比一张儿童床便宜多少元?
(2) 估计一下,妈妈带了600元,买一张电脑桌和一把椅子,够不够?
够$\square$ 不够$\square$
(1) 一张电脑桌比一张儿童床便宜多少元?
(2) 估计一下,妈妈带了600元,买一张电脑桌和一把椅子,够不够?
够$\square$ 不够$\square$
答案
登录