巧算:1/5-1/10-1/20-1/40-1/80-1/160-1/320=?(要写计算过程!)

问题描述:

巧算:1/5-1/10-1/20-1/40-1/80-1/160-1/320=?(要写计算过程!)

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是对的吗?当然...