直接写出得数．
|
80 ÷4＝ |
|
400 ×5＝ |
|
4.5 ＋3.2＝ |
|
3.1 －0.4＝ |
|
269 ÷7≈ |
| 73×22≈ |
口算(从左到右)
|
60 ×60 |
23 ×40 |
21 ×30 |
42 ×10 |
比比谁算得快．
(分数，先填分子，后填分母)|
(1) |
(2) |
|
(3) |
(4) |
|
(5) |
(6) |
|
(7) |
(8) |
比比谁算得快．
|
(1)4.6 ＋2.1= |
(2)5.2 ＋0.7= |
(3)3.5 ＋7.2= |
|
(4)6.3 ＋0.5= |
(5)7.4 －2.2= |
(6)6.9 －1.5= |
|
(7)4.7 －0.7= |
(8)8.2 －5.2= |
比比谁算得快．
(分数，先填分子，后填分母)|
(1) |
(2) |
|
(3) |
(4) |
|
(5) |
(6) |
比比谁算得快．
(分数，先填分子，后填分母)|
(1) |
(2) |
|
(3) |
(4) |
|
(5) |
(6) |
