| 求下面各比的比值并化简: 14:21 |
| 6:
| 0.5:2.5. |
=14÷21,
=
| 2 |
| 3 |
14:21,
=(14÷7):(21÷7),
=2:3.
(2)
| 9 |
| 11 |
| 3 |
| 22 |
=
| 9 |
| 11 |
| 3 |
| 22 |
=6;
| 9 |
| 11 |
| 3 |
| 22 |
=(
| 9 |
| 11 |
| 3 |
| 22 |
=18:3,
=6:1.
(3)6:
| 1 |
| 6 |
=6÷
| 1 |
| 6 |
=36;
6:
| 1 |
| 6 |
=(6×6):(
| 1 |
| 6 |
=36:1.
(4)0.5:2.5,
=0.5÷2.5,
=0.2;
0.5:2.5,
=(0.5×2):(2.5×2),
=1:5.