题目内容
求比值并化简比.
| ①1.25:4.5 | ②32:56 | ③
|
1.25:4.5,
=1.25÷4.5,
=
;
1.25:4.5,
=(1.25×100):(4.5×100),
=125:450,
=(125÷25):(450÷25),
=5:18;
32:56,
=32÷56,
=
;
32:56,
=(32÷8):(56÷8),
=4:7;
:
,
=
÷
,
=
;
:
,
=(
×24):(
×24),
=20:21.
=1.25÷4.5,
=
| 5 |
| 18 |
1.25:4.5,
=(1.25×100):(4.5×100),
=125:450,
=(125÷25):(450÷25),
=5:18;
32:56,
=32÷56,
=
| 4 |
| 7 |
32:56,
=(32÷8):(56÷8),
=4:7;
| 5 |
| 6 |
| 7 |
| 8 |
=
| 5 |
| 6 |
| 7 |
| 8 |
=
| 20 |
| 21 |
| 5 |
| 6 |
| 7 |
| 8 |
=(
| 5 |
| 6 |
| 7 |
| 8 |
=20:21.
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