题目内容
| 解方程: x-
|
| ||||||
| 4+0.2x=0.72 | x-
|
(1)x-
x=1
x=1
x÷
=1÷
x=4;
(2)
:x=
÷x=
÷x×x=
×x
x=
x÷
=
÷
x=6;
(3)4+0.2x=0.72
4+0.2x-4=0.72-4
0.2x=-3.28
0.2x÷0.2=-3.28÷0.2
x=-16.4;
(4)x-
x-6=16
x-6=16
x-6+6=16+6
x=22
x÷
=22÷
x=110.
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
x=4;
(2)
| 3 |
| 4 |
| 1 |
| 8 |
| 3 |
| 4 |
| 1 |
| 8 |
| 3 |
| 4 |
| 1 |
| 8 |
| 1 |
| 8 |
| 3 |
| 4 |
| 1 |
| 8 |
| 1 |
| 8 |
| 3 |
| 4 |
| 1 |
| 8 |
x=6;
(3)4+0.2x=0.72
4+0.2x-4=0.72-4
0.2x=-3.28
0.2x÷0.2=-3.28÷0.2
x=-16.4;
(4)x-
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
x=110.
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