题目内容
| 解方程(比例) 1.8-
| 1
|
(1)1.8-
x=
+
x=1.8
+
x-
=1.8-
x=1.2
x×2=1.2×2
x=2.4;
(2)1
:4=x:7.5
4x=1
×7.5
4x=12
4x÷4=12÷4
x=3.
| 1 |
| 2 |
| 3 |
| 5 |
| 3 |
| 5 |
| 1 |
| 2 |
| 3 |
| 5 |
| 1 |
| 2 |
| 3 |
| 5 |
| 3 |
| 5 |
| 1 |
| 2 |
| 1 |
| 2 |
x=2.4;
(2)1
| 3 |
| 5 |
4x=1
| 3 |
| 5 |
4x=12
4x÷4=12÷4
x=3.
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