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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