题目内容
解比例或方程.
(1)1.2:X=
:
(2)4.5-1.2X=2.7.
(1)1.2:X=
| 1 |
| 2 |
| 5 |
| 6 |
(2)4.5-1.2X=2.7.
(1)1.2:X=
:
,
x=1.2×
,
x÷
=1÷
,
x=2;
(2)4.5-1.2X=2.7,
4.5-1.2X+1.2x=2.7+1.2x,
4.5-2.7=2.7+1.2x-2.7,
1.8÷1.2=1.2x÷1.2,
x=1.5.
| 1 |
| 2 |
| 5 |
| 6 |
| 1 |
| 2 |
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
x=2;
(2)4.5-1.2X=2.7,
4.5-1.2X+1.2x=2.7+1.2x,
4.5-2.7=2.7+1.2x-2.7,
1.8÷1.2=1.2x÷1.2,
x=1.5.
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