把下面每组中的分数通分.(1)45、23和56;(2)47、15和635;(3)310、425和215;(4)14、56和716.-数学

题目简介

把下面每组中的分数通分.(1)45、23和56;(2)47、15和635;(3)310、425和215;(4)14、56和716.-数学

题目详情

把下面每组中的分数通分.
(1)
4
5
2
3
5
6

(2)
4
7
1
5
6
35

(3)
3
10
4
25
2
15

(4)
1
4
5
6
7
16
题型:填空题难度:中档来源:不详

答案

(1)class="stub"4
5
=class="stub"4×6
5×6
=class="stub"24
30

class="stub"2
3
=class="stub"2×10
3×10
=class="stub"20
30

class="stub"5
6
=class="stub"5×5
6×5
=class="stub"25
30


(2)class="stub"4
7
=class="stub"4×5
7×5
=class="stub"20
35

class="stub"1
5
=class="stub"1×7
5×7
=class="stub"7
35

class="stub"6
35
=class="stub"6
35


(3)class="stub"3
10
=class="stub"3×15
10×15
=class="stub"45
150

class="stub"4
25
=class="stub"4×6
25×6
=class="stub"24
150

class="stub"2
15
=class="stub"2×10
15×10
=class="stub"20
150


(4)class="stub"1
4
=class="stub"1×12
4×12
=class="stub"12
48

class="stub"5
6
=class="stub"5×8
6×8
=class="stub"40
48

class="stub"7
16
=class="stub"7×3
16×3
=class="stub"21
48

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