题目内容
解比例.
|
|
|
(1)
=
,
32x=21×8,
x=
,
x=
,
(2)
:
=x:
,
x=
×
,
x=
,
x=
÷
,
x=
,
(2)
=0.5,
0.5x=3.2,
x=3.2÷0.5,
x=6.4
| 21 |
| x |
| 32 |
| 8 |
32x=21×8,
x=
| 21×8 |
| 32 |
x=
| 21 |
| 4 |
(2)
| 1 |
| 20 |
| 1 |
| 5 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 20 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 80 |
x=
| 1 |
| 80 |
| 1 |
| 5 |
x=
| 1 |
| 16 |
(2)
| 3.2 |
| x |
0.5x=3.2,
x=3.2÷0.5,
x=6.4
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