题目内容
计算下面各题.
÷2+30×12.5%
40%×13+87×0.4.
| 13 |
| 4 |
40%×13+87×0.4.
(1)
÷2+30×12.5%
=
×
+30×
,
=
+
,
=
;
(2)40%×13+87×0.4
=0.4×13+87×0.4,
=(13+37)×0.4,
=50×0.4,
=20.
| 13 |
| 4 |
=
| 13 |
| 4 |
| 1 |
| 2 |
| 1 |
| 8 |
=
| 13 |
| 8 |
| 30 |
| 8 |
=
| 43 |
| 8 |
(2)40%×13+87×0.4
=0.4×13+87×0.4,
=(13+37)×0.4,
=50×0.4,
=20.
练习册系列答案
相关题目