1. 直接写出得数。
0.2 + 4.5 =
2 - 0.8 =
0.7 + 11.3 =
1.04 - 0.02 =
2.64 - 2.6 =
0.46 + 0.54 =
0.52 - 0.32 =
3.01 + 8.9 =

0.2 + 4.5 = 4.7
2 - 0.8 = 1.2
0.7 + 11.3 = 12
1.04 - 0.02 = 1.02
2.64 - 2.6 = 0.04
0.46 + 0.54 = 1
0.52 - 0.32 = 0.2
3.01 + 8.9 = 11.91

2. 列竖式计算。
4.87 + 4.18 =
20.55 - 11.06 =
2.1 - 0.33 =
13.98 + 8.03 =
5.67 + 1.7 =
10 - 7.47 =

4.87 + 4.18 = 9.05
```
4.87
+ 4.18
--------
9.05
```
20.55 - 11.06 = 9.49
```
20.55
-11.06
--------
9.49
```
2.1 - 0.33 = 1.77
```
2.10
0.33
--------
1.77
```
13.98 + 8.03 = 22.01
```
13.98
+ 8.03
--------
22.01
```
5.67 + 1.7 = 7.37
```
5.67
+ 1.70
--------
7.37
```
10 - 7.47 = 2.53
```
10.00
7.47
--------
2.53
```