题目内容
解方程.(温馨提醒:注意书写格式哦!)
| X:2=5:0.4 | 15.3-3X=0.3 |
|
(1)X:2=5:0.4,
0.4x=2×5,
0.4x=10,
0.4x÷0.4=10÷0.4,
x=25;
(2)15.3-3X=0.3,
15.3-3X+3x=0.3+3x,
15.3-0.3=0.3+3x-0.3,
15÷3=3x÷3,
x=5;
(3)
x-
x=0.7+2.3,
x=3,
x÷
=3÷
,
x=36.
0.4x=2×5,
0.4x=10,
0.4x÷0.4=10÷0.4,
x=25;
(2)15.3-3X=0.3,
15.3-3X+3x=0.3+3x,
15.3-0.3=0.3+3x-0.3,
15÷3=3x÷3,
x=5;
(3)
| 5 |
| 6 |
| 3 |
| 4 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 12 |
x=36.
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