题目内容
| 解方程. (1)1.8:x=7.2:0.8 | (2)χ+5%χ=0.42÷10% | (3)32÷χ=
|
(1)1.8:x=7.2:0.8,
7.2x=1.8×0.8,
7.2x÷7.2=1.44÷7.2,
x=0.2;
(2)x+5%x=0.42÷10%,
105%x=4.2,
105%x÷105%=4.2÷105%,
x=4;
(3)32÷x=
÷125%,
32÷x=
,
32÷x×x=
×x,
x÷
=32÷
,
x=24.
7.2x=1.8×0.8,
7.2x÷7.2=1.44÷7.2,
x=0.2;
(2)x+5%x=0.42÷10%,
105%x=4.2,
105%x÷105%=4.2÷105%,
x=4;
(3)32÷x=
| 5 |
| 3 |
32÷x=
| 4 |
| 3 |
32÷x×x=
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
x=24.
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