题目内容
| 解方程 40%x-
|
| 75x÷
|
(1)40%x-
=
,
0.4x-
+
=
+
,
0.4x=1,
0.4x÷0.4=1÷0.4,
x=2.5;
(2)
+
x=2,
+
x-
=2-
,
x=
,
x÷
=
÷
,
x=10;
(3)75x÷
=
,
75x÷
×
=
×
,
75x=
.
75x÷75=
÷75,
x=
.
| 1 |
| 5 |
| 4 |
| 5 |
0.4x-
| 1 |
| 5 |
| 1 |
| 5 |
| 4 |
| 5 |
| 1 |
| 5 |
0.4x=1,
0.4x÷0.4=1÷0.4,
x=2.5;
(2)
| 8 |
| 9 |
| 1 |
| 9 |
| 8 |
| 9 |
| 1 |
| 9 |
| 8 |
| 9 |
| 8 |
| 9 |
| 1 |
| 9 |
| 10 |
| 9 |
| 1 |
| 9 |
| 1 |
| 9 |
| 10 |
| 9 |
| 1 |
| 9 |
x=10;
(3)75x÷
| 1 |
| 3 |
| 3 |
| 8 |
75x÷
| 1 |
| 3 |
| 1 |
| 3 |
| 3 |
| 8 |
| 1 |
| 3 |
75x=
| 1 |
| 8 |
75x÷75=
| 1 |
| 8 |
x=
| 1 |
| 600 |
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