题目内容
求未知数x的值.
(1)x-
x=
(2)x:25=
.
(1)x-
| 3 |
| 4 |
| 5 |
| 8 |
(2)x:25=
| 1.2 |
| 75 |
(1)x-
x=
,
x=
,
x×4=
×4,
x=2
;
(2)x:25=
,
75x=25×1.2,
75x÷75=30÷75,
x=0.4.
| 3 |
| 4 |
| 5 |
| 8 |
| 1 |
| 4 |
| 5 |
| 8 |
| 1 |
| 4 |
| 5 |
| 8 |
x=2
| 1 |
| 2 |
(2)x:25=
| 1.2 |
| 75 |
75x=25×1.2,
75x÷75=30÷75,
x=0.4.
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