题目内容
解比例或方程
x-0.8x=22
x:5=
:0.5
x-
=
.
x-0.8x=22
x:5=
| 2 |
| 5 |
x-
| 3 |
| 4 |
| 7 |
| 12 |
(1)x-0.8x=22,
0.2x=22,
0.2x÷0.2=22÷0.2,
x=110;
(2)x:5=
:0.5,
0.5x=5×
,
0.5x÷0.5=2÷0.5,
x=4;
(3)x-
=
,
x-
+
=
+
,
x=1
.
0.2x=22,
0.2x÷0.2=22÷0.2,
x=110;
(2)x:5=
| 2 |
| 5 |
0.5x=5×
| 2 |
| 5 |
0.5x÷0.5=2÷0.5,
x=4;
(3)x-
| 3 |
| 4 |
| 7 |
| 12 |
x-
| 3 |
| 4 |
| 3 |
| 4 |
| 7 |
| 12 |
| 3 |
| 4 |
x=1
| 1 |
| 3 |
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