题目内容
下面( )的积在
和
之间.
| 1 |
| 3 |
| 4 |
| 5 |
A、
| ||||
B、
| ||||
C、
|
分析:先计算出每个选项中算式的积,再与
和
进行通分,即可作出正确选择.
| 1 |
| 3 |
| 4 |
| 5 |
解答:解:选项A,
×
=
=
,
选项B,
×
=
=
,
选项C,
×4=
=
,
又因
=
,
=
,
且
>
>
,
即
>
×
>
;
故选:B.
| 1 |
| 3 |
| 3 |
| 4 |
| 1 |
| 4 |
| 15 |
| 60 |
选项B,
| 4 |
| 5 |
| 1 |
| 2 |
| 2 |
| 5 |
| 24 |
| 60 |
选项C,
| 1 |
| 3 |
| 4 |
| 3 |
| 80 |
| 60 |
又因
| 1 |
| 3 |
| 20 |
| 60 |
| 4 |
| 5 |
| 48 |
| 60 |
且
| 48 |
| 60 |
| 24 |
| 60 |
| 20 |
| 60 |
即
| 4 |
| 5 |
| 4 |
| 5 |
| 1 |
| 2 |
| 1 |
| 3 |
故选:B.
点评:此题主要考查分数的基本性质的灵活应用.
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