题目内容
求比值: ①35:45 |
②360:450 | ③0.3:0.15 | ||||||
④18:
|
⑤6:0.36 | ⑥
| ||||||
⑦0.6:
|
⑧
|
分析:根据求比值的方法,就用比的前项除以比的后项所得的商即为比值;据此进行计算.
解答:解:①35:45
=35÷45
=
;
②360:450
=360÷450
=
;
③0.3:0.15
=0.3÷0.15
=2;
④18:
=18÷
=27;
⑤6:0.36
=6÷0.36
=
;
⑥
:
=
÷
=
;
⑦0.6:
=0.6÷
=
;
⑧
:6
=
÷6
=
.
=35÷45
=
7 |
9 |
②360:450
=360÷450
=
4 |
5 |
③0.3:0.15
=0.3÷0.15
=2;
④18:
2 |
3 |
=18÷
2 |
3 |
=27;
⑤6:0.36
=6÷0.36
=
50 |
3 |
⑥
3 |
20 |
4 |
5 |
=
3 |
20 |
4 |
5 |
=
3 |
16 |
⑦0.6:
2 |
5 |
=0.6÷
2 |
5 |
=
3 |
2 |
⑧
2 |
3 |
=
2 |
3 |
=
1 |
9 |
点评:此题考查求比值的方法:比的前项除以比的后项所得的商;要注意区分:求比值的结果是一个数,可以是小数、分数和整数;而化简比的结果仍是一个比.
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