通分并比较大小.1321和815914和67512和71658和49.-数学

题目简介

通分并比较大小.1321和815914和67512和71658和49.-数学

题目详情

通分并比较大小.
13
21
8
15
9
14
6
7
5
12
7
16
5
8
4
9
题型:解答题难度:中档来源:不详

答案

(1)class="stub"13
21
=class="stub"65
105

class="stub"8
15
=class="stub"56
105

class="stub"65
105
>class="stub"56
105

所以class="stub"13
21
>class="stub"8
15


(2)class="stub"6
7
=class="stub"12
14

class="stub"9
14
<class="stub"12
14

所以class="stub"9
14
<class="stub"6
7


(3)class="stub"5
12
=class="stub"20
48

class="stub"7
16
=class="stub"21
48

class="stub"20
48
<class="stub"21
48

所以class="stub"5
12
<class="stub"7
16


(4)class="stub"5
8
=class="stub"45
72

class="stub"4
9
=class="stub"32
72

class="stub"45
72
>class="stub"32
72

所以class="stub"5
8
>class="stub"4
9

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