题目内容
解方程.
X-
|
| X÷0.4=0.16. |
(1)x-
=
,
x-
+
=
+
,
x=
;
(2)
+x=
,
+x-
=
-
,
x=
;
(3)3x=4,
3x÷3=4÷3,
x=
;
(4)x÷0.4=0.16,
x÷0.4×0.4=0.16×0.4,
x=0.064.
| 7 |
| 8 |
| 7 |
| 8 |
x-
| 7 |
| 8 |
| 7 |
| 8 |
| 7 |
| 8 |
| 7 |
| 8 |
x=
| 7 |
| 4 |
(2)
| 2 |
| 5 |
| 3 |
| 2 |
| 2 |
| 5 |
| 2 |
| 5 |
| 3 |
| 2 |
| 2 |
| 5 |
x=
| 11 |
| 10 |
(3)3x=4,
3x÷3=4÷3,
x=
| 4 |
| 3 |
(4)x÷0.4=0.16,
x÷0.4×0.4=0.16×0.4,
x=0.064.
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