题目内容
解方程.
X+
=
X÷2.5=0.8.
X+
| 3 |
| 8 |
| 9 |
| 8 |
X÷2.5=0.8.
(1)X+
=
,
X+
-
=
-
,
X=
;
(2)X÷2.5=0.8,
X÷2.5×2.5=0.8×2.5,
X=2.
| 3 |
| 8 |
| 9 |
| 8 |
X+
| 3 |
| 8 |
| 3 |
| 8 |
| 9 |
| 8 |
| 3 |
| 8 |
X=
| 3 |
| 4 |
(2)X÷2.5=0.8,
X÷2.5×2.5=0.8×2.5,
X=2.
练习册系列答案
相关题目