题目内容
求比值:15:12
240:160
200:4
:
1.8:2.7
:2.7.
240:160
200:4
| 1 |
| 4 |
| 5 |
| 6 |
1.8:2.7
| 9 |
| 4 |
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:15:12
=15÷12
=1.25;
240:160
=240÷160
=1.5;
200:4
=200÷4
=50;
:
=
÷
=
;
1.8:2.7
=1.8÷2.7
=
;
:2.7
=
÷
=
.
=15÷12
=1.25;
240:160
=240÷160
=1.5;
200:4
=200÷4
=50;
| 1 |
| 4 |
| 5 |
| 6 |
=
| 1 |
| 4 |
| 5 |
| 6 |
=
| 3 |
| 10 |
1.8:2.7
=1.8÷2.7
=
| 2 |
| 3 |
| 9 |
| 4 |
=
| 9 |
| 4 |
| 27 |
| 10 |
=
| 5 |
| 6 |
点评:求比值是用比的前项除以后项,结果除不尽的用分数表示.
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