先约分,再化成带分数 12分之42, 4/12, 18/63, 9/21, 42/28,56/49,12先约分,再化成带分数 12分之42, 4/12, 18/63, 9/21, 42/28, 56/49, 12/36

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先约分,再化成带分数12分之42, 4/12, 18/63, 9/21, 42/28,56/49,12先约分,再化成带分数12分之42, 4/12, 18/63, 9/21, 42/28, 56/49

先约分,再化成带分数 12分之42, 4/12, 18/63, 9/21, 42/28,56/49,12先约分,再化成带分数 12分之42, 4/12, 18/63, 9/21, 42/28, 56/49, 12/36
先约分,再化成带分数 12分之42, 4/12, 18/63, 9/21, 42/28,56/49,12
先约分,再化成带分数 12分之42, 4/12, 18/63, 9/21, 42/28, 56/49, 12/36

先约分,再化成带分数 12分之42, 4/12, 18/63, 9/21, 42/28,56/49,12先约分,再化成带分数 12分之42, 4/12, 18/63, 9/21, 42/28, 56/49, 12/36
12分之42=7/2=3又2分之1;
4/12=1/3;
18/63=2/7
9/21=3/7;
42/28=6/4=3/2=1又2分之1;
56/49=8/7=1又7分之1;
12=12;
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