题目内容
求比值 0.4:0.06 |
0.15:
| ||||
|
0.25:
| ||||
1.6:2.5 |
| ||||
|
2.4米:20厘米. |
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)0.4:0.06,
=0.4÷0.06,
=
;
(2)0.15:
,
=0.15÷
,
=0.5;
(3)
:5:14,
=(
×21):(5×21):(14×21),
=5:105:294;
(4)0.25:
,
=0.25÷
,
=
;
(5)1.6:2.5,
=1.6÷2.5,
=
;
(6)
:8.4,
=
÷8.4,
=
;
(7)
:5,
=
÷5,
=
;
(8)2.4米:20厘米,
=(2.4×100厘米):20厘米,
=240÷20,
=12.
=0.4÷0.06,
=
20 |
3 |
(2)0.15:
3 |
10 |
=0.15÷
3 |
10 |
=0.5;
(3)
5 |
21 |
=(
5 |
21 |
=5:105:294;
(4)0.25:
1 |
10 |
=0.25÷
1 |
10 |
=
5 |
2 |
(5)1.6:2.5,
=1.6÷2.5,
=
16 |
25 |
(6)
7 |
4 |
=
7 |
4 |
=
5 |
24 |
(7)
5 |
2 |
=
5 |
2 |
=
1 |
2 |
(8)2.4米:20厘米,
=(2.4×100厘米):20厘米,
=240÷20,
=12.
点评:此题主要考查了求比值的方法,注意求比值的结果是一个商,可以是整数、小数或分数.
练习册系列答案
相关题目