1. 直接写出得数。
$0.9÷0.01=$ $2.8÷0.7=$ $2.4×0.3=$ $1÷4=$
$0.96÷0.3=$ $1.5×0.4=$ $12÷0.3=$ $0.3×0.9=$
$2.5÷0.05=$ $1÷0.125=$ $0.75×2=$ $1.4÷0.07=$
$0.08×100=$ $5.5÷0.55=$ $5.46+4.54=$ $10-3.78=$
$4.2÷3=$ $9.8÷0.7=$ $0.9÷4.5=$ $0÷6.23=$
$48.8÷8=$ $14.4÷0.09=$ $39÷1.3=$ $0.72÷0.12=$
$20.5÷20.5=$ $1.1÷0.5=$ $4.2÷14=$ $7.2÷0.2=$
$0.25×39+0.25=$ $8.9÷0.2÷5=$ $0.25×4÷0.5=$

9
4
0.72
0.25
3.2
0.6
40
0.27
50
8
1.5
20
8
10
10
6.22
1.4
14
0.2
0
6.1
160
30
6
1
2.2
0.3
36
10
8.9
2

2. 用竖式计算。(带☆的要验算,除不尽的得数保留一位小数。)
$0.396÷1.2=$ $0.756÷0.24=$ ☆$3.06÷36=$
$16.9÷0.13=$ $7.15×2.2=$ $5.6÷3.7≈$
$5.02÷0.32=$ $0.29÷1.7≈$ ☆$3.5÷1.4=$

0.396÷1.2=0.33
```
0.33
12)3.96
3 6
---
36
36
---
0
```
0.756÷0.24=3.15
```
3.15
24)75.6
72
---
36
24
---
120
120
---
0
```
☆3.06÷36=0.085
计算：
```
0.085
36)3.060
2 88
---
180
180
---
0
```
验算：
```
0.085
× 36
----
510
255
----
3.060
```
16.9÷0.13=130
```
130
13)1690
13
---
39
39
---
0
```
7.15×2.2=15.73
```
7.15
× 2.2
----
1430
1430
----
15.730
```
5.6÷3.7≈1.5
```
1.51
37)56.00
37
---
190
185
---
50
37
---
13
```
（保留一位小数，四舍五入得1.5）
5.02÷0.32=15.6875
```
15.6875
32)502.0000
480
---
220
192
---
280
256
---
240
224
---
160
160
---
0
```
0.29÷1.7≈0.2
```
0.170
17)2.900
1 7
---
120
119
---
100
85
---
15
```
（保留一位小数，四舍五入得0.2）
☆3.5÷1.4=2.5
计算：
```
2.5
14)35.0
28
---
70
70
---
0
```
验算：
```
2.5
×1.4
----
100
25
----
3.50
```