题目内容
在下面的括号里面填上适当的数.
=
=
=
=
.
| 3 |
| 5 |
| ( ) |
| 15 |
| 12 |
| ( ) |
| 6 |
| 24 |
| 12 |
| ( ) |
| ( ) |
| 12 |
分析:根据分数的基本性质,分子和分母都乘上(或除以)相同的数(0除外),分数大小不变,即可得出答案.
解答:解:
=
=
,
=
=
,
所以
=
;
=
=
,
=
=
.
故答案为:9,20;48,3.
| 3 |
| 5 |
| 3×3 |
| 5×3 |
| 9 |
| 15 |
| 3 |
| 5 |
| 3×4 |
| 5×4 |
| 12 |
| 20 |
所以
| 3 |
| 5 |
| 9 |
| 15 |
| 12 |
| 20 |
| 6 |
| 24 |
| 6×2 |
| 24×2 |
| 12 |
| 48 |
| 6 |
| 24 |
| 6÷2 |
| 24÷2 |
| 3 |
| 12 |
故答案为:9,20;48,3.
点评:此题主要考查分数的基本性质的运用.
练习册系列答案
相关题目