题目内容
| 化简下面各比. 75:0.45 |
|
2.1:
|
(1)75:0.45,
=(75×20):(0.45×20),
=1500:9,
=500:3;
(2)
:
,
=(
×18):(
×18),
=6:7;
(3)2.1:
,
=(
×70):(
×70),
=147:30,
=(147÷3):(30÷3),
=49:10.
=(75×20):(0.45×20),
=1500:9,
=500:3;
(2)
| 1 |
| 3 |
| 7 |
| 18 |
=(
| 1 |
| 3 |
| 7 |
| 18 |
=6:7;
(3)2.1:
| 3 |
| 7 |
=(
| 21 |
| 10 |
| 3 |
| 7 |
=147:30,
=(147÷3):(30÷3),
=49:10.
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化简下面各比.
| 75:0.45 | 2.1: |