题目内容
解方程或比例.
①
x+
x=
②
=
③0.5x-4×0.25=1.25.
①
| 1 |
| 4 |
| 1 |
| 2 |
| 5 |
| 8 |
②
| 2x |
| 0.6 |
| 0.9 |
| 3 |
③0.5x-4×0.25=1.25.
(1)
x+
x=
x=
,
x×
=
×
,
x=
;
(2)
=
,
2×3x=0.6×0.9,
6x=0.54,
6x÷6=0.54÷6,
x=0.09;
(3)0.5x-4×0.25=1.25,
0.5x-1=1.25,
0.5x-1+1=1.25+1,
0.5x÷0.5=2.25÷0.5,
x=4.5.
| 1 |
| 4 |
| 1 |
| 2 |
| 5 |
| 8 |
| 3 |
| 4 |
| 5 |
| 8 |
| 3 |
| 4 |
| 4 |
| 3 |
| 5 |
| 8 |
| 4 |
| 3 |
x=
| 5 |
| 6 |
(2)
| 2x |
| 0.6 |
| 0.9 |
| 3 |
2×3x=0.6×0.9,
6x=0.54,
6x÷6=0.54÷6,
x=0.09;
(3)0.5x-4×0.25=1.25,
0.5x-1=1.25,
0.5x-1+1=1.25+1,
0.5x÷0.5=2.25÷0.5,
x=4.5.
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