题目内容
解下列方程
(1)x-
x=9
(2)1
:0.25=x:1
.
(1)x-
| 2 |
| 5 |
(2)1
| 1 |
| 4 |
| 3 |
| 5 |
(1)x-
x=9,
(1-
)x=9,
x×
=9×
,
x=15;
(2))1
:0.25=x:1
,
0.25x=1
×1
,
0.25x÷0.25=2÷0.25,
x=8.
| 2 |
| 5 |
(1-
| 2 |
| 5 |
| 3 |
| 5 |
| 5 |
| 3 |
| 5 |
| 3 |
x=15;
(2))1
| 1 |
| 4 |
| 3 |
| 5 |
0.25x=1
| 1 |
| 4 |
| 3 |
| 5 |
0.25x÷0.25=2÷0.25,
x=8.
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