(1)42:28=______=______
(2)0.5:0.15=______=______
(3)
| 7 |
| 8 |
| 5 |
| 6 |
比值是:42:28=42÷28=1.5;
(2)0.5:0.15=(0.5×100):(0.15×100)=50:15=(50÷5):(15÷5)=10:3,
比值是:0.5:0.15=
| 50 |
| 100 |
| 15 |
| 100 |
| 50 |
| 100 |
| 100 |
| 15 |
| 10 |
| 3 |
(3)
| 7 |
| 8 |
| 5 |
| 6 |
| 7 |
| 8 |
| 5 |
| 6 |
比值是:
| 7 |
| 8 |
| 5 |
| 6 |
| 7 |
| 8 |
| 5 |
| 6 |
| 7 |
| 8 |
| 6 |
| 5 |
| 21 |
| 20 |
故填:(1)3:2,1.5;
(2)10:3,
| 10 |
| 3 |
(3)21:20,
| 21 |
| 20 |