题目内容
解方程或比例.
x-
x=1.4
=
.
x-
| 1 |
| 3 |
| 0.8 |
| x |
| 7.2 |
| 8 |
(1)x-
x=1.4,
x=1.4,
x×
=1.4×
,
x=2.1;
(2)
=
,
7.2x=0.8×8,
7.2x=6.4,
7.2x÷7.2=6.4÷7.2,
x=
.
| 1 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 2 |
| 3 |
| 2 |
x=2.1;
(2)
| 0.8 |
| x |
| 7.2 |
| 8 |
7.2x=0.8×8,
7.2x=6.4,
7.2x÷7.2=6.4÷7.2,
x=
| 8 |
| 9 |
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