1/2+1/3+1/4+1/5+1/6+1/12+ - 知识问答

1/2+1/3+1/4+1/5+1/6+1/12+1/30 简便运算

8个回答

1/2+1/3+1/4+1/5+1/6+1/12+1/30
=1/2+1/3+1/4+1/5+1/6+1/3-1/4+1/5-1/6
=1/2+1/3+1/5+1/3+1/5
=1/2+2/3+2/5
=47/30
=1又17/30

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