题目内容
把下面各组中的分数通分,并比较大小.
和
、
和
、
和
.
| 7 |
| 15 |
| 11 |
| 20 |
| 1 |
| 12 |
| 3 |
| 5 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 18 |
| 11 |
| 12 |
(1)因为:
=
,
=
,
<
,
所以:
<
;
(2)因为:
=
,
=
,
=
,
<
<
,
所以:
<
<
,;
(3)因为:
=
,
=
,
=
,
<
<
,
所以:
<
<
.
| 7 |
| 15 |
| 28 |
| 60 |
| 11 |
| 20 |
| 33 |
| 60 |
| 28 |
| 60 |
| 33 |
| 60 |
所以:
| 7 |
| 15 |
| 11 |
| 20 |
(2)因为:
| 1 |
| 12 |
| 5 |
| 60 |
| 3 |
| 5 |
| 36 |
| 60 |
| 3 |
| 4 |
| 45 |
| 60 |
| 5 |
| 60 |
| 36 |
| 60 |
| 45 |
| 60 |
所以:
| 1 |
| 12 |
| 3 |
| 5 |
| 3 |
| 4 |
(3)因为:
| 5 |
| 6 |
| 30 |
| 36 |
| 7 |
| 18 |
| 14 |
| 36 |
| 11 |
| 12 |
| 33 |
| 36 |
| 14 |
| 36 |
| 30 |
| 36 |
| 33 |
| 36 |
所以:
| 7 |
| 18 |
| 5 |
| 6 |
| 11 |
| 12 |
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