题目内容
求出下面各比的比值.
(1)75:3.
(2)2
:
(3)1.2:
.
(1)75:3.
(2)2
| 1 |
| 4 |
| 3 |
| 10 |
(3)1.2:
| 2 |
| 3 |
分析:用比的前项除以后项即可.
解答:解:(1)75:3,
=75÷3,
=25;
(2)2
:
,
=2
:
,
=
÷
,
=
×
,
=
;
(3)1.2:
,
=1.2÷
,
=1.2×
,
=1.8.
=75÷3,
=25;
(2)2
| 1 |
| 4 |
| 3 |
| 10 |
=2
| 1 |
| 4 |
| 3 |
| 10 |
=
| 9 |
| 4 |
| 3 |
| 10 |
=
| 9 |
| 4 |
| 10 |
| 3 |
=
| 15 |
| 2 |
(3)1.2:
| 2 |
| 3 |
=1.2÷
| 2 |
| 3 |
=1.2×
| 3 |
| 2 |
=1.8.
点评:此题主要考查了求比值的方法,另外还要注意求比值的结果是一个商,可以是整数、小数或分数.
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