通分并比较大小:311和712518和727712和948.-数学

题目简介

通分并比较大小:311和712518和727712和948.-数学

题目详情

通分并比较大小:
3
11
7
12
5
18
7
27
7
12
9
48
题型:解答题难度:中档来源:不详

答案

(1)class="stub"3
11
=class="stub"3×12
11×12
=class="stub"36
132
class="stub"7
12
=class="stub"7×11
12×11
=class="stub"77
132

所以class="stub"3
11
class="stub"7
12

(2)class="stub"5
18
=class="stub"5×3
18×3
=class="stub"15
54
class="stub"7
27
=class="stub"7×2
27×2
=class="stub"14
54

所以class="stub"5
18
>class="stub"7
27

(3)class="stub"7
12
=class="stub"7×4
12×4
=class="stub"28
48

所以class="stub"7
12
>class="stub"9
48

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