题目内容
| 1 |
| 6 |
| 7 |
| 48 |
| 11 |
| 13 |
| 4 |
| 5 |
| 2 |
| 5 |
| 3 |
| 7 |
| 5 |
| 8 |
| 9 |
| 16 |
| 7 |
| 18 |
| 5 |
| 12 |
分析:根据分数的大小比较的方法:先通分,再进行比较,进而得出答案.
解答:解:(1)因为
=
,
且
>
,
所以
>
;
(2)因为
=
,
=
,
且
>
,
所以
>
;
(3)因为
=
,
=
,
=
,
且
<
<
,
所以
<
<
;
(4)因为
=
,
=
,
=
,
且
>
>
,
所以
>
>
.
| 1 |
| 6 |
| 8 |
| 48 |
且
| 8 |
| 48 |
| 7 |
| 48 |
所以
| 1 |
| 6 |
| 7 |
| 48 |
(2)因为
| 11 |
| 13 |
| 55 |
| 65 |
| 4 |
| 5 |
| 52 |
| 65 |
且
| 55 |
| 65 |
| 52 |
| 65 |
所以
| 11 |
| 13 |
| 4 |
| 5 |
(3)因为
| 2 |
| 5 |
| 112 |
| 280 |
| 3 |
| 7 |
| 120 |
| 280 |
| 5 |
| 8 |
| 175 |
| 280 |
且
| 112 |
| 280 |
| 120 |
| 280 |
| 175 |
| 280 |
所以
| 2 |
| 5 |
| 3 |
| 7 |
| 5 |
| 8 |
(4)因为
| 9 |
| 16 |
| 81 |
| 144 |
| 7 |
| 18 |
| 56 |
| 144 |
| 5 |
| 12 |
| 60 |
| 144 |
且
| 81 |
| 144 |
| 60 |
| 144 |
| 56 |
| 144 |
所以
| 9 |
| 16 |
| 5 |
| 12 |
| 7 |
| 18 |
点评:此题考查分数大小比较的方法,注意理解并灵活运用分数的大小比较的方法.
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