题目内容
算一算:
×
×
×
.
| 1 |
| 4 |
| 1 |
| 5 |
| 2 |
| 3 |
| 1 |
| 7 |
| 3 |
| 14 |
| 1 |
| 2 |
分析:通过观察,这几题都不能约分,用分子相乘的积做分子,分母相乘的积做分母,据此解答.
解答:解:(1)
×
=
;
(2)
×
=
;
(3)
×
=
.
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 20 |
(2)
| 2 |
| 3 |
| 1 |
| 7 |
| 2 |
| 21 |
(3)
| 3 |
| 14 |
| 1 |
| 2 |
| 3 |
| 28 |
点评:掌握分数乘法的法则,是解本题的关键.
练习册系列答案
相关题目