题目内容
X-
=
+X=
3X=4
X÷0.4=0.16.
| 7 |
| 8 |
| 7 |
| 8 |
| 2 |
| 5 |
| 3 |
| 2 |
3X=4
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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