把下面各组分数通分.23和5927和38712和7876和89.-数学

题目简介

把下面各组分数通分.23和5927和38712和7876和89.-数学

题目详情

把下面各组分数通分.
2
3
5
9

2
7
3
8

7
12
7
8

7
6
8
9
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"5
9
=class="stub"5×1
9×1
=class="stub"5
9


(2)class="stub"2
7
=class="stub"2×8
7×8
=class="stub"16
56

class="stub"3
8
=class="stub"3×7
8×7
=class="stub"21
56


(3)class="stub"7
12
=class="stub"7×2
12×2
=class="stub"14
24

class="stub"7
8
=class="stub"7×3
8×3
=class="stub"21
24


(4)class="stub"7
6
=class="stub"7×3
6×3
=class="stub"21
18

class="stub"8
9
=class="stub"8×2
9×2
=class="stub"16
18

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