解比例.
(1)12:x=
:
(2)x:7.5=0.028:
(3)0.4:x=(1+
):5
(4)4:
=x:6.5
(5)
=
(6)0.8:3
=(5-x):0.75.
(1)12:x=
| 1 |
| 8 |
| 3 |
| 4 |
(2)x:7.5=0.028:
| 3 |
| 4 |
(3)0.4:x=(1+
| 1 |
| 7 |
(4)4:
| 5 |
| 6 |
(5)
| x |
| 0.15 |
| 2 |
| 1.25 |
(6)0.8:3
| 3 |
| 4 |
| 1 |
| 8 |
| 3 |
| 4 |
| 3 |
| 4 |
| 1 |
| 7 |
| 5 |
| 6 |
| x |
| 0.15 |
| 2 |
| 1.25 |
| 3 |
| 4 |