题目内容
求比值.
|
|
0.05:2.5 |
| ||||||||||
|
|
7.5:0.5 |
|
分析:有单位的先把单位统一,再用比的前项除以后项即可.
解答:解:
:
,
=
÷
,
=
;
:
,
=
÷
,
=
;
0.05:2.5,
=0.05÷2.5,
=0.02;
:63,
=
÷63,
=
;
:4,
=
÷4,
=
;
:81,
=
÷81,
=
;
7.5:0.5,
=7.5÷0.5,
=15;
吨:250千克,
=400千克:250千克,
=400÷250,
=1.6.
| 3 |
| 4 |
| 3 |
| 7 |
=
| 3 |
| 4 |
| 3 |
| 7 |
=
| 7 |
| 4 |
| 7 |
| 13 |
| 7 |
| 11 |
=
| 7 |
| 13 |
| 7 |
| 11 |
=
| 11 |
| 13 |
0.05:2.5,
=0.05÷2.5,
=0.02;
| 7 |
| 9 |
=
| 7 |
| 9 |
=
| 1 |
| 81 |
| 3 |
| 4 |
=
| 3 |
| 4 |
=
| 3 |
| 16 |
| 9 |
| 50 |
=
| 9 |
| 50 |
=
| 1 |
| 450 |
7.5:0.5,
=7.5÷0.5,
=15;
| 2 |
| 5 |
=400千克:250千克,
=400÷250,
=1.6.
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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