简便计算（1/4-1/8）除以5/12-5/12 - 知识问答

简便计算（1/4-1/8）除以5/12-5/12 【17/12-（3/4-1/6）】除以3/4

2个回答

（1/4-1/8）除以5/12-5/12
=（1/4-1/8）*12/5-5/12
=3/5-3/10-5/12
=3/10-5/12
=18-25/60
=-7/60
【17/12-（3/4-1/6）】除以3/4
=【17/12-（3/4-1/6）】*4/3
=17/9-（3/4-1/6）*4/3
=17/9-1+2/9
=10/9

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