题目内容
比较大小:
< <
|
> >
|
< < 2 | ||||||||||
= =
|
1
< <
|
分析:(1)(2)(3)可先将各组分数通分后化成同分母分数后再进行比较.(4)可将带分数化成假分数,或将假分数化成带分数后再进行比较.(5)可将带分数化成假分数比较.
解答:解:(1)
=
,则
<
;
(2)
=
,
=
,
则
>
;
(3)
=
;
(4)1
=
,
则1
<
.
(5)
=1
,
则
<2.
故答案为:<,>,=,<.
| 5 |
| 8 |
| 10 |
| 16 |
| 5 |
| 8 |
| 11 |
| 8 |
(2)
| 5 |
| 12 |
| 10 |
| 24 |
| 3 |
| 8 |
| 9 |
| 24 |
则
| 5 |
| 12 |
| 3 |
| 8 |
(3)
| 6 |
| 8 |
| 12 |
| 16 |
(4)1
| 5 |
| 8 |
| 13 |
| 8 |
则1
| 5 |
| 8 |
| 23 |
| 8 |
(5)
| 6 |
| 5 |
| 1 |
| 5 |
则
| 6 |
| 5 |
故答案为:<,>,=,<.
点评:在比较异分母分数的大小时,可先将异分母分数化成同分母分数后再进行比较.
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