题目内容
| 2:2.8 | 3:5
|
|
6.24:2.1. |
分析:利用比的基本性质化简比,利用比的前项除以比的后项求得比值即可.
解答:解:2:2.8=20:28=5:7,
2:2.8=2÷2.8=
;
3:5
=3:
=9:16,
3:5
=3÷
=
;
=
,
=
;
6.24:2.1=624:210=104:35,
6.24:2.1=6.24÷2.1=
.
2:2.8=2÷2.8=
| 5 |
| 7 |
3:5
| 1 |
| 3 |
| 16 |
| 3 |
3:5
| 1 |
| 3 |
| 16 |
| 3 |
| 9 |
| 16 |
| 99 |
| 44 |
| 9 |
| 4 |
| 99 |
| 44 |
| 9 |
| 4 |
6.24:2.1=624:210=104:35,
6.24:2.1=6.24÷2.1=
| 104 |
| 35 |
点评:此题考查求比值和化简比,求比值的结果是一个数,分数、小数或整数;而化简比的结果是一个比,也可以写成分数形式.
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