题目内容
解比例
:
=x:
:x=3:12.
| 3 |
| 4 |
| 9 |
| 10 |
| 3 |
| 5 |
| 3 |
| 4 |
(1)
:
=x:
,
x=
×
,
x×
=
×
×
,
x=
,
(2)
:x=3:12,
3x=12×
,
3x÷3=9÷3,
x=3.
| 3 |
| 4 |
| 9 |
| 10 |
| 3 |
| 5 |
| 9 |
| 10 |
| 3 |
| 4 |
| 3 |
| 5 |
| 9 |
| 10 |
| 10 |
| 9 |
| 3 |
| 4 |
| 3 |
| 5 |
| 10 |
| 9 |
x=
| 1 |
| 2 |
(2)
| 3 |
| 4 |
3x=12×
| 3 |
| 4 |
3x÷3=9÷3,
x=3.
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