1/6+1/12+1/20+1/30+1/42+1/56=?

学习时间:2026-04-07 21:30:07 阅读：6950

1/6+1/12+1/20+1/30+1/42+1/56=?简便记算

威武的舞蹈

2026-04-07 21:30:07

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1/6+1/12+1/20+1/30+1/42+1/56=(1/2-1/3)+(1/3-1/4)+。。。+(1/7-1/8)=1/2+(1/3-1/3)+…+(1/7-1/7)-1/8=1/2-1/8=3/8