题目内容
化简比.
| 1.25:4.5 | 7:
|
|
|
(1)1.25:4.5,
=(1.25×100):(4.5×100),
=125:450,
=(125÷25):(450÷25),
=5:18;
(2)7:
,
=(7×8):(
×8),
=56:7,
=(56÷7):(7÷7),
=8:1;
(3)
:1
,
=(
×15):(
×15),
=7:36;
(4)
:
,
=(
×24):(
×24),
=9:8.
=(1.25×100):(4.5×100),
=125:450,
=(125÷25):(450÷25),
=5:18;
(2)7:
| 7 |
| 8 |
=(7×8):(
| 7 |
| 8 |
=56:7,
=(56÷7):(7÷7),
=8:1;
(3)
| 7 |
| 15 |
| 7 |
| 5 |
=(
| 7 |
| 15 |
| 12 |
| 5 |
=7:36;
(4)
| 3 |
| 8 |
| 1 |
| 3 |
=(
| 3 |
| 8 |
| 1 |
| 3 |
=9:8.
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