把下面各组分数通分.1124和2372;712和1315;512、78和1116.-五年级数学

题目简介

把下面各组分数通分.1124和2372;712和1315;512、78和1116.-五年级数学

题目详情

把下面各组分数通分.
11
24
23
72
;    
7
12
13
15
;    
5
12
7
8
11
16
题型:解答题难度:中档来源:不详

答案

根据通分的方法,
class="stub"11
24
=class="stub"11×3
24×3
=class="stub"33
72
class="stub"23
72
=class="stub"23
72


class="stub"7
12
=class="stub"7×5
12×5
=class="stub"35
60
class="stub"13
15
=class="stub"13×4
15×4
=class="stub"52
60


class="stub"5
12
=class="stub"5×4
12×4
=class="stub"20
48
class="stub"7
8
=class="stub"7×6
8×6
=class="stub"42
48
class="stub"11
16
=class="stub"11×3
16×3
=class="stub"33
48

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