题目内容
| 解方程 x:1.2=3:4 | x-
|
|
(1)x:1.2=3:4,
4x=1.2×3,
4x=3.6,
4x÷4=3.6÷4,
x=0.9;
(2)x-
=8.5,
x-
+
=8.5+
,
x=8.65;
(3)
=0.5,
×x=0.5×x,
3.2=0.5x,
3.2÷0.5=0.5x÷0.5,
x=6.4.
4x=1.2×3,
4x=3.6,
4x÷4=3.6÷4,
x=0.9;
(2)x-
| 3 |
| 20 |
x-
| 3 |
| 20 |
| 3 |
| 20 |
| 3 |
| 20 |
x=8.65;
(3)
| 3.2 |
| x |
| 3.2 |
| x |
3.2=0.5x,
3.2÷0.5=0.5x÷0.5,
x=6.4.
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