题目内容
解比例.
| X:3.25=
|
|
|
(1)
=
,
3X=0.5×0.8,
3X÷3=0.4÷3,
X=
;
(2)X:3.25=
:
,
X=3.25×
,
X×
=0.65×
,
X=0.52.
(3)
:X=3:12,
3X=12×
,
3X÷3=9÷3,
X=3;
(4)
=
,
14X=0.7×5,
14X÷14=3.5÷14,
X=0.25.
| 0.5 |
| X |
| 3 |
| 0.8 |
3X=0.5×0.8,
3X÷3=0.4÷3,
X=
| 2 |
| 15 |
(2)X:3.25=
| 1 |
| 5 |
| 5 |
| 4 |
| 5 |
| 4 |
| 1 |
| 5 |
| 5 |
| 4 |
| 4 |
| 5 |
| 4 |
| 5 |
X=0.52.
(3)
| 3 |
| 4 |
3X=12×
| 3 |
| 4 |
3X÷3=9÷3,
X=3;
(4)
| 0.7 |
| X |
| 14 |
| 5 |
14X=0.7×5,
14X÷14=3.5÷14,
X=0.25.
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