① 直接写出得数。
$4.5÷5=$ $18.6÷6=$ $5.6÷4=$
$15.3÷3=$ $0.72÷8=$ $9.6÷6=$

$4.5÷5=0.9$
$18.6÷6=3.1$
$5.6÷4=1.4$
$15.3÷3=5.1$
$0.72÷8=0.09$
$9.6÷6=1.6$

2 用竖式计算，打 * 的要验算。
84.7 ÷ 7 =
1.96 ÷ 14 =
204 ÷ 25 =
9.88 ÷ 76 =
45.9 ÷ 15 =
25. 2 ÷ 24 =
495 ÷ 75 =
3 ÷ 12 =
0. 546 ÷ 21 =

```
12.1
7)84.7
7
---
14
14
---
7
7
---
0
84.7 ÷ 7 = 12.1
```
```
0.14
14)1.96
1 4
----
56
56
----
0
1.96 ÷ 14 = 0.14
```
```
8.16
25)204.00
200
----
4 0
2 5
----
1 50
1 50
----
0
204 ÷ 25 = 8.16
```
```
0.13
76)9.88
7 6
----
2 28
2 28
----
0
9.88 ÷ 76 = 0.13
```
```
3.06
15)45.90
45
----
90
90
----
0
45.9 ÷ 15 = 3.06
```
```
1.05
24)25.20
24
----
1 20
1 20
----
0
*25.2 ÷ 24 = 1.05
验算：
1.05
× 24
------
420
210
------
25.20
```
```
6.6
75)495.0
450
----
45 0
45 0
----
0
495 ÷ 75 = 6.6
```
```
0.25
12)3.00
2 4
----
60
60
----
0
3 ÷ 12 = 0.25
```
```
0.026
21)0.546
42
----
126
126
----
0
*0.546 ÷ 21 = 0.026
验算：
0.026
× 21
-------
0026
052
-------
0.546
```

3 根据$84 ÷ 3 = 28$，直接写出下面各题的商。
$0.84 ÷ 3 =$
$840 ÷ 3 =$
$8.4 ÷ 3 =$
$0.084 ÷ 3 =$

$0.84 ÷ 3 = 0.28$
$840 ÷ 3 = 280$
$8.4 ÷ 3 = 2.8$
$0.084 ÷ 3 = 0.028$