题目内容
求比值
|
4个月:2年 |
| ||||||
0.125:0.8 | 0.7:14 |
| ||||||
|
2:0.75. |
分析:求比值是根据比的意义(两个数相除又叫两个数的比),用比的前项除以比的后项.
解答:解:(1)
:
=
÷
=
×5
=
;
(2)4个月:2年
=4个月:24个月
=4÷24
=
;
(3)
米:48厘米
=60厘米:48厘米
=60÷48
=
;
(4)0.125:0.8
=0.125÷0.8
=
;
(5)0.7:14
=0.7÷14
=
;
(6)
吨:450千克
=3500千克:450千克
=3500÷450
=
;
(7)
:
=
÷
=
×
=
;
(8)2:0.75
=2÷0.75
=2×
=
.
1 |
4 |
1 |
5 |
=
1 |
4 |
1 |
5 |
=
1 |
4 |
=
5 |
4 |
(2)4个月:2年
=4个月:24个月
=4÷24
=
1 |
6 |
(3)
3 |
5 |
=60厘米:48厘米
=60÷48
=
5 |
4 |
(4)0.125:0.8
=0.125÷0.8
=
5 |
32 |
(5)0.7:14
=0.7÷14
=
1 |
20 |
(6)
7 |
2 |
=3500千克:450千克
=3500÷450
=
70 |
9 |
(7)
7 |
10 |
3 |
4 |
=
7 |
10 |
3 |
4 |
=
7 |
10 |
4 |
3 |
=
14 |
15 |
(8)2:0.75
=2÷0.75
=2×
4 |
3 |
=
8 |
3 |
点评:求比值是用比的前项除以后项,小数化成分数进行计算,结果最好用分数表示.
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