把下面各组分数通分.23和1938和51225,710和1120.-数学

题目简介

把下面各组分数通分.23和1938和51225,710和1120.-数学

题目详情

把下面各组分数通分.
2
3
1
9

3
8
5
12

2
5
7
10
11
20
题型:解答题难度:中档来源:不详

答案

(1)class="stub"2
3
=class="stub"2×3
3×3
=class="stub"6
9

class="stub"1
9
=class="stub"1
9


(2)class="stub"3
8
=class="stub"3×3
8×3
=class="stub"9
24

class="stub"5
12
=class="stub"5×2
12×2
=class="stub"10
24

(3)class="stub"2
5
=class="stub"2×4
5×4
=class="stub"8
20

class="stub"7
10
=class="stub"7×2
10×2
=class="stub"14
20

class="stub"11
20
=class="stub"11
20

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