题目内容
| 解比例. X:0.8=9:4 |
36:6=X:
| ||||||||||
|
|
(1)X:0.8=9:4,
4X=0.8×9,
4X÷4=7.2÷4,
X=1.8;
(2)36:6=X:
,
6X=
×36,
6X÷6=28.8÷6,
X=4.8;
(3)
:
=X:
,
X=
×
.
X×3=
×3,
X=
;
(4)
=
,
0.32X=120×1.6,
0.32X÷032=192÷0.32,
X=600.
4X=0.8×9,
4X÷4=7.2÷4,
X=1.8;
(2)36:6=X:
| 4 |
| 5 |
6X=
| 4 |
| 5 |
6X÷6=28.8÷6,
X=4.8;
(3)
| 1 |
| 8 |
| 1 |
| 3 |
| 1 |
| 10 |
| 1 |
| 3 |
| 1 |
| 8 |
| 1 |
| 10 |
| 1 |
| 3 |
| 1 |
| 80 |
X=
| 3 |
| 80 |
(4)
| 120 |
| X |
| 0.32 |
| 1.6 |
0.32X=120×1.6,
0.32X÷032=192÷0.32,
X=600.
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