小数加减法专项练习

法则：小数点对齐(即数位对齐)，满十进一，退一当十注意：计算结果末尾的0要去掉；整数减小数注意补0

一、列竖式计算

8.11 - 7.28 =

0.83

1.47 + 8.81 =

10.28

3.5 + 8.43 =

11.93

10 + 1.83 =

11.83

3.86 - 2.4 =

1.46

21 - 2.58 =

18.42

6.8 + 6.72 =

13.52

47 - 2.66 =

44.34

7.99 + 6 =

13.99

6.85 + 6.29 =

13.14

43 - 4.5 =

38.5

7.7 - 2.37 =

5.33

二、怎样简便就怎样算

1.9 + 5.5 + 6.1 =

13.5

2.4 + 6.3 + 2.6 =

11.3

1.5 + 3.5 + 7.1 =

12.1

22.2 - 1.52 - 2.48 =

18.2

9.8 - 4.18 - 1.82 =

3.8

7.7 + 6.3 + 6 =

20

13.8 - 4.04 - 3.96 =

5.8

15 - 5.25 - 4.75 =

5

3.9 + 7.1 + 4 =

15