问题 解答题
计算下列各题,并验算.
9.6+17.4=1.67-0.73=7-1.854=12.78+6.38=
答案

9.6+17.4=27;

9.6

+17.4
27.0

验算:

17.4

+9.6
27.0

1.67-0.73=0.94;

1.67

-0.73
0.94

验算:

0.73

+0.94
1.67

7-1.854=5.146;

7

-1.854
5.146

验算:

1.854

+5.146
7.000

12.78+6.38=19.16;

12.78

+6.38
19.16

验算:

6.38

+12.78
19.16

单项选择题
单项选择题