6分之1+12分之1+20分之1+30分之1+42分之1+56分之1等于几

2025-04-18 04:53:08
推荐回答(1个)
回答1:

1/6+1/12+1/20+1/30+1/42+1/56
=(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+(1/6-1/7)+(1/7-1/8)
=1/2-1/8
=3/8