题目内容
先通分,再比较下面各组分数的大小.
和
和
和
和
.
| 7 |
| 8 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 9 |
| 11 |
| 5 |
| 15 |
| 7 |
| 3 |
| 10 |
| 1 |
| 4 |
(1)因为
=
,且
>
,
所以
>
;
(2)因为
=
,
=
,
且
>
,
所以
>
;
(3)因为
=
,
=
,
且
>
,
所以
>
;
(4)因为
=
,
=
,
且
>
,
所以
>
.
| 3 |
| 4 |
| 6 |
| 8 |
| 7 |
| 8 |
| 6 |
| 8 |
所以
| 7 |
| 8 |
| 3 |
| 4 |
(2)因为
| 5 |
| 6 |
| 15 |
| 18 |
| 7 |
| 9 |
| 14 |
| 18 |
且
| 15 |
| 18 |
| 14 |
| 18 |
所以
| 5 |
| 6 |
| 7 |
| 9 |
(3)因为
| 11 |
| 5 |
| 77 |
| 35 |
| 15 |
| 7 |
| 75 |
| 35 |
且
| 77 |
| 35 |
| 75 |
| 35 |
所以
| 11 |
| 5 |
| 15 |
| 7 |
(4)因为
| 3 |
| 10 |
| 6 |
| 20 |
| 1 |
| 4 |
| 5 |
| 20 |
且
| 6 |
| 20 |
| 5 |
| 20 |
所以
| 3 |
| 10 |
| 1 |
| 4 |
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