题目内容
求未知数.
:
=x:
=
.
| 3 |
| 4 |
| 9 |
| 10 |
| 3 |
| 5 |
| 12.5 |
| 2.5 |
| x |
| 8 |
(1)
:
=x:
,
x=
×
,
x÷
=
÷
,
x=
;
(2)
=
,
2.5x=12.5×8,
2.5x÷2.5=100÷2.5,
x=40.
| 3 |
| 4 |
| 9 |
| 10 |
| 3 |
| 5 |
| 9 |
| 10 |
| 3 |
| 4 |
| 3 |
| 5 |
| 9 |
| 10 |
| 9 |
| 10 |
| 9 |
| 20 |
| 9 |
| 10 |
x=
| 1 |
| 2 |
(2)
| 12.5 |
| 2.5 |
| x |
| 8 |
2.5x=12.5×8,
2.5x÷2.5=100÷2.5,
x=40.
练习册系列答案
相关题目