题目内容
把下面的每组中的两个分数通分.
|
|
分析:根据通分的方法,把异分母分数化成大小与原来相等的同分母分数.据此解答.
解答:解:
和
,
=
=
;
=
=
;
和
,
=
=
;
=
=
.
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1×4 |
| 3×4 |
| 4 |
| 12 |
| 1 |
| 4 |
| 1×3 |
| 4×3 |
| 3 |
| 12 |
| 7 |
| 8 |
| 5 |
| 6 |
| 7 |
| 8 |
| 7×3 |
| 8×3 |
| 21 |
| 24 |
| 5 |
| 6 |
| 5×4 |
| 6×4 |
| 20 |
| 24 |
点评:此题考查的目的是理解通分的意义掌握通分的方法.
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