题目内容
求下列各比的比值 28:49 |
|
0.04:5 | ||||||||||
|
4
|
|
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:(1)28:49,
=28÷49,
=
;
(2)
,
=0.85÷0.125,
=6.8;
(3)0.04:5,
=0.04÷5,
=0.008;
(4)
:
,
=
÷
,
=
;
(5)4
:3
,
=
÷
,
=
,
(6)
:0.24,
=
÷0.24,
=2.5.
=28÷49,
=
4 |
7 |
(2)
0.85 |
0.125 |
=0.85÷0.125,
=6.8;
(3)0.04:5,
=0.04÷5,
=0.008;
(4)
4 |
5 |
13 |
4 |
=
4 |
5 |
13 |
4 |
=
16 |
65 |
(5)4
1 |
4 |
1 |
3 |
=
17 |
4 |
10 |
3 |
=
51 |
40 |
(6)
3 |
5 |
=
3 |
5 |
=2.5.
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;而化简比的结果是一个比.
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