题目内容
解比例
=
40:χ=2.5:15
:
=20:χ
| 2 |
| 8 |
| 9 |
| x |
40:χ=2.5:15
| 3 |
| 4 |
| 1 |
| 5 |
(1)
=
,
2x=8×9,
2x÷2=72÷2,
x=36;
(2)40:x=2.5:15,
2.5x=40×15,
2.5x÷2.5=600÷2.5,
x=240;
(3)
:
=20:x,
x=
×20,
x÷
=4÷
,
x=5
.
| 2 |
| 8 |
| 9 |
| x |
2x=8×9,
2x÷2=72÷2,
x=36;
(2)40:x=2.5:15,
2.5x=40×15,
2.5x÷2.5=600÷2.5,
x=240;
(3)
| 3 |
| 4 |
| 1 |
| 5 |
| 3 |
| 4 |
| 1 |
| 5 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
x=5
| 1 |
| 3 |
练习册系列答案
相关题目