一、口算。
$2.2 + 6.3 = $
$5.36 + 21 = $
$0.68 - 0.45 = $
$0.47 - 0.2 = $
$3.57 - 1.2 = $
$1.97 - 0.54 = $
$0.34 + 10.4 = $
$15.7 + 3 = $
$2.2 + 6.3 = $
8.5
$13.8 - 1.6 = $12.2
$2.3 + 0.14 = $2.44
$5.36 + 21 = $
26.36
$4.56 - 4.22 = $0.34
$4.33 + 5.42 = $9.75
$0.68 - 0.45 = $
0.23
$4.33 + 4.16 = $8.49
$4.45 - 2.4 = $2.05
$0.47 - 0.2 = $
0.27
$10.2 + 4.5 = $14.7
$0.6 + 8.3 = $8.9
$3.57 - 1.2 = $
2.37
$7.62 - 2.42 = $5.2
$1.2 + 5.5 = $6.7
$1.97 - 0.54 = $
1.43
$7.17 + 1.5 = $8.67
$3.46 - 3.06 = $0.4
$0.34 + 10.4 = $
10.74
$9.6 - 3.2 = $6.4
$5.2 + 7.2 = $12.4
$15.7 + 3 = $
18.7
$1.6 - 0.8 = $0.8
$1.9 - 0.26 = $1.64
答案
一、8.5 12.2 2.44 26.36 0.34 9.75 0.23 8.49 2.05 0.27 14.7 8.9 2.37 5.2 6.7 1.43 8.67 0.4 10.74 6.4 12.4 18.7 0.8 1.64
二、用竖式计算。
$2.36 + 1.7$ $3.78 + 4.09$ $4.54 + 5.38$
$21.8 + 10.27$ $4.57 + 2.44$ $9.62 + 5.78$
$2.36 + 1.7$ $3.78 + 4.09$ $4.54 + 5.38$
$21.8 + 10.27$ $4.57 + 2.44$ $9.62 + 5.78$
答案
解析
```
2.36
+ 1.70
------
4.06
3.78
+ 4.09
------
7.87
4.54
+ 5.38
------
9.92
21.80
+10.27
------
32.07
4.57
+ 2.44
------
7.01
9.62
+ 5.78
------
15.40
```
2.36
+ 1.70
------
4.06
3.78
+ 4.09
------
7.87
4.54
+ 5.38
------
9.92
21.80
+10.27
------
32.07
4.57
+ 2.44
------
7.01
9.62
+ 5.78
------
15.40
```
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