题目内容
解比例.
10:12=X:30
:
=X:
.
10:12=X:30
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(1)10:12=x:30,
12x=10×30,
12x÷12=300÷12,
x=25;
(2)
:
=x:
,
x=
×
,
x÷
=
÷
,
x=
.
12x=10×30,
12x÷12=300÷12,
x=25;
(2)
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| 1 |
| 8 |
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| 8 |
| 1 |
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| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 64 |
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x=
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