比较下列各组数的大小.(1)-45与-34;(2)13,-12,-|-13|,0.-数学

题目简介

比较下列各组数的大小.(1)-45与-34;(2)13,-12,-|-13|,0.-数学

题目详情

比较下列各组数的大小.
(1)-
4
5
-
3
4
;(2)
1
3
-
1
2
-|-
1
3
|
,0.
题型:解答题难度:中档来源:不详

答案

(1)∵|-class="stub"4
5
|=class="stub"4
5
=class="stub"16
20
,|-class="stub"3
4
|=class="stub"3
4
=class="stub"15
20

∴-class="stub"4
5
<-class="stub"3
4


(2)∵-|-class="stub"1
3
|=-class="stub"1
3

而|-class="stub"1
2
|=class="stub"1
2
=class="stub"3
6
,|-class="stub"1
3
|=class="stub"1
3
=class="stub"2
6

∴-class="stub"1
2
<-class="stub"1
3

class="stub"1
3
-class="stub"1
2
-|-class="stub"1
3
|
,0的大小关系为:-class="stub"1
2
<-|-class="stub"1
3
|<0<class="stub"1
3

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