题目内容
请分别写出三个与下列分数大小相等的分数:
(1)
;
(2)
;
(3)
;
(4)
.
(1)
| 1 |
| 4 |
(2)
| 3 |
| 5 |
(3)
| 4 |
| 6 |
(4)
| 6 |
| 4 |
分析:分数的分母和分子同时乘以或除以相同的数(零除外),分数的大小不变.根据分数基本性质,即可写出与与这几个分数相等的分数.
解答:解:(1)
=
=
=
;
(2)
=
=
=
;
(3)
=
=
=
;
(4)
=
=
=
.
| 1 |
| 4 |
| 2 |
| 8 |
| 3 |
| 12 |
| 4 |
| 16 |
(2)
| 3 |
| 5 |
| 6 |
| 10 |
| 9 |
| 15 |
| 12 |
| 20 |
(3)
| 4 |
| 6 |
| 2 |
| 3 |
| 6 |
| 9 |
| 8 |
| 12 |
(4)
| 6 |
| 4 |
| 3 |
| 2 |
| 9 |
| 4 |
| 12 |
| 8 |
点评:本题主要考查了分数的基本性质的灵活应用.
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