题目内容
解比例
(1)0.8:4=x:8(2)
:x=3:12
(3)
=
(4)x:
=
:4.
(1)0.8:4=x:8(2)
| 3 |
| 4 |
(3)
| 36 |
| x |
| 54 |
| 3 |
| 1 |
| 2 |
| 2 |
| 3 |
(1)0.8:4=x:8
4x=0.8×8
x=
| 0.8×8 |
| 4 |
x=1.6
(2)
| 3 |
| 4 |
3x=
| 3 |
| 4 |
3x=9
3x÷3=9÷3
x=3
(3)
| 36 |
| x |
| 54 |
| 3 |
36×3=54x
54x=108
54x÷54=108÷54
x=2
(4)x:
| 1 |
| 2 |
| 2 |
| 3 |
4x=
| 1 |
| 2 |
| 2 |
| 3 |
4x=
| 1 |
| 3 |
4x÷4=
| 1 |
| 3 |
x=
| 1 |
| 12 |
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