题目内容
解方程:
(1)x÷
=
(2)
x+
x=
(3)12x+7×0.3=14.7.
(1)x÷
| 3 |
| 5 |
| 3 |
| 10 |
(2)
| 1 |
| 2 |
| 2 |
| 3 |
| 5 |
| 6 |
(3)12x+7×0.3=14.7.
(1)x÷
| 3 |
| 5 |
| 3 |
| 10 |
x÷
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 10 |
| 3 |
| 5 |
x=
| 9 |
| 50 |
(2)
| 1 |
| 2 |
| 2 |
| 3 |
| 5 |
| 6 |
| 7 |
| 6 |
| 5 |
| 6 |
| 7 |
| 6 |
| 6 |
| 7 |
| 5 |
| 6 |
| 6 |
| 7 |
x=
| 5 |
| 7 |
(3)12x+7×0.3=14.7,
12x+2.1=14.7,
12x+2.1-2.1=14.7-2.1,
12x=12.6,
12x÷12=12.6÷12,
x=1.05.
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