题目内容
把下面每组中两个分数通分
和
和
和
.
| 5 |
| 6 |
| 3 |
| 4 |
| 5 |
| 12 |
| 13 |
| 24 |
| 1 |
| 3 |
| 5 |
| 9 |
分析:先求分母的最小公倍数,然后根据分数的基本性质通分即可解答问题.
解答:解:(1)
=
=
=
=
;
(2)
=
=
;
(3)
=
=
.
| 5 |
| 6 |
| 5×2 |
| 6×2 |
| 10 |
| 12 |
| 3 |
| 4 |
| 3×3 |
| 4×3 |
| 9 |
| 12 |
(2)
| 5 |
| 12 |
| 5×2 |
| 12×2 |
| 10 |
| 24 |
| 13 |
| 24 |
(3)
| 1 |
| 3 |
| 1×3 |
| 3×3 |
| 3 |
| 9 |
| 5 |
| 9 |
点评:此题主要考查利用分数的基本性质把分数进行通分的方法.
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