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一、口算。
12.6 - 2.5 =
20 - 6.9 =
5.4 + 2.34 =
6.3 + 3.7 =
3.86 + 7.23 =
0.99 + 1.8 =
7.93 - 0.3 =
7.5 - 5.7 =
0.9 - 0.09 =
1.3 + 0.03 =
0.37 + 0.73 =
4.8 + 2.02 =
1.04 - 0.4 =
7.3 + 2.1 =
0.49 + 0.51 =
6 - 2.35 =
2.74 - 0.68 =
21.5 + 9.5 =
2.68 - 0.37 =
0.49 + 0.55 =
2.8 - 0.28 =
6.3 - 0.7 =
22.5 + 9.4 =
0.19 + 5.1 =
12.6 - 2.5 =
10.1
20 - 6.9 =
13.1
5.4 + 2.34 =
7.74
6.3 + 3.7 =
10
3.86 + 7.23 =
11.09
0.99 + 1.8 =
2.79
7.93 - 0.3 =
7.63
7.5 - 5.7 =
1.8
0.9 - 0.09 =
0.81
1.3 + 0.03 =
1.33
0.37 + 0.73 =
1.1
4.8 + 2.02 =
6.82
1.04 - 0.4 =
0.64
7.3 + 2.1 =
9.4
0.49 + 0.51 =
1
6 - 2.35 =
3.65
2.74 - 0.68 =
2.06
21.5 + 9.5 =
31
2.68 - 0.37 =
2.31
0.49 + 0.55 =
1.04
2.8 - 0.28 =
2.52
6.3 - 0.7 =
5.6
22.5 + 9.4 =
31.9
0.19 + 5.1 =
5.29
答案
一、10.1 13.1 7.74 10 11.09 2.79 7.63 1.8 0.81 1.33 1.1 6.82 0.64 9.4 1 3.65 2.06 31 2.31 1.04 2.52 5.6 31.9 5.29
二、用竖式计算。
6.54 + 4.96
9.04 - 0.36
15.59 + 4.7
3.91 + 4.76
70 - 2.37
8.2 - 3.47
6.54 + 4.96
9.04 - 0.36
15.59 + 4.7
3.91 + 4.76
70 - 2.37
8.2 - 3.47
答案
二、11.5 8.68 20.29 8.67 67.63 4.73
解析
```
6.54
+ 4.96
------
11.50
9.04
0.36
------
8.68
15.59
+ 4.70
------
20.29
3.91
+ 4.76
------
8.67
70.00
2.37
------
67.63
8.20
3.47
------
4.73
```
6.54
+ 4.96
------
11.50
9.04
0.36
------
8.68
15.59
+ 4.70
------
20.29
3.91
+ 4.76
------
8.67
70.00
2.37
------
67.63
8.20
3.47
------
4.73
```
