题目内容
解方程或比例
| x:
| X-0.125=
| 4+0.7x=102. |
(1)
x+0.4=
,
x+0.4-0.4=
-0.4,
x×4=
×4,
x=1.6;
(2)x:
=75%:0.8,
0.8x=
×75%,
0.8x÷0.8=
÷0.8,
x=
;
(3)x-0.125=
,
x-0.125+0.125=
+0.125,
x=
;
(4)4+0.7x=102,
4+0.7x-4=102-4,
0.7x÷0.7=98÷0.7,
x=140.
| 1 |
| 4 |
| 4 |
| 5 |
| 1 |
| 4 |
| 4 |
| 5 |
| 1 |
| 4 |
| 2 |
| 5 |
x=1.6;
(2)x:
| 2 |
| 5 |
0.8x=
| 2 |
| 5 |
0.8x÷0.8=
| 3 |
| 10 |
x=
| 3 |
| 8 |
(3)x-0.125=
| 1 |
| 8 |
x-0.125+0.125=
| 1 |
| 8 |
x=
| 1 |
| 4 |
(4)4+0.7x=102,
4+0.7x-4=102-4,
0.7x÷0.7=98÷0.7,
x=140.
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