把下面每组分数通分.512和1318815和71256和38.-数学

题目简介

把下面每组分数通分.512和1318815和71256和38.-数学

题目详情

把下面每组分数通分.
5
12
13
18
8
15
7
12
5
6
3
8
题型:解答题难度:中档来源:不详

答案

(1)12和18的最小公倍数是36,
class="stub"5
12
=class="stub"5×3
12×3
=class="stub"15
36

class="stub"13
18
=class="stub"13×2
18×2
=class="stub"26
36


(2)15和12的最小公倍数是60,
class="stub"8
15
=class="stub"8×4
15×4
=class="stub"32
60

class="stub"7
12
=class="stub"7×5
12×5
=class="stub"35
60

(3)6和8的最小公倍数是24,
class="stub"5
6
=class="stub"5×4
6×4
=class="stub"20
24

class="stub"3
8
=class="stub"3×3
8×3
=class="stub"9
24

更多内容推荐