题目内容
解方程.
①
-5x=0.125
②x:0.2=
.
①
| 3 |
| 8 |
②x:0.2=
| 5 |
| 8 |
(1)
-5x=0.125,
-5x+5x=0.125+5x,
-0.125=0.125+5x-0.125,
0.25=5x,
0.25÷5=5x÷5,
x=0.05;
(2)x:0.2=
,
8x=0.2×5,
8x=1,
8x÷8=1÷8,
x=0.125.
| 3 |
| 8 |
| 3 |
| 8 |
| 3 |
| 8 |
0.25=5x,
0.25÷5=5x÷5,
x=0.05;
(2)x:0.2=
| 5 |
| 8 |
8x=0.2×5,
8x=1,
8x÷8=1÷8,
x=0.125.
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