题目内容
把下面分数改写成分母是48而大小不变的分数.
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| 5 |
| 8 |
| 2 |
| 3 |
| 72 |
| 96 |
| 30 |
| 240 |
| 45 |
| 144 |
分析:本题根据分数的基本性质将题目中的分数按要求通分即可.
解答:解:
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.
| 5 |
| 8 |
| 5×6 |
| 8×6 |
| 30 |
| 48 |
| 2 |
| 3 |
| 2×16 |
| 3×16 |
| 32 |
| 48 |
| 72 |
| 96 |
| 72÷2 |
| 96÷2 |
| 36 |
| 48 |
| 30 |
| 240 |
| 30÷5 |
| 240÷5 |
| 6 |
| 48 |
| 45 |
| 144 |
| 45÷3 |
| 144÷3 |
| 15 |
| 48 |
点评:分数的基本性质:分数的分子与分母同时扩大或缩小相同的倍数(0除外),分数的大小不变.
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