bbnnmm1022
幼苗
共回答了22个问题采纳率:86.4% 举报
1/5-1/10-1/20-1/40-1/80-1/160-1/320
=1/5-1/10-1/20-1/40-1/80-1/160-1/320-1/320+1/320
=1/5-1/10-1/20-1/40-1/80-1/160-1/160+1/320
=1/5-1/10-1/20-1/40-1/80-1/80+1/320
=1/5-1/10-1/20-1/40-1/40+1/320
=1/5-1/10-1/20-1/20+1/320
=1/5-1/10-1/10+1/320
=1/5-1/5+1/320
=1/320
1年前
追问
8