题目内容
| 2 |
| 3 |
| 6 |
| 5 |
| Χ |
| 4 |
(1)
:
=x:9,
x=
×9,
x=6,
×
x=6×
,
x=5;
(2)
=30%,
x=4×30%,
x=1.2.
| 2 |
| 3 |
| 6 |
| 5 |
| 6 |
| 5 |
| 2 |
| 3 |
| 6 |
| 5 |
| 6 |
| 5 |
| 5 |
| 6 |
| 5 |
| 6 |
x=5;
(2)
| x |
| 4 |
x=4×30%,
x=1.2.
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