1-2/1 - 4/1.- 64/1 - 128/1 - 256/1

问题描述:

1-2/1 - 4/1.- 64/1 - 128/1 - 256/1

1-2/1 - 4/1.- 64/1 - 128/1 - 256/1 =256/1
1-(1-1/2)-(1/2-1/4).-(1/64-1/128)-(1/128-1/256)
=1-1+1/2-1/2+1/4-4/1.1/64-1/64+1/128-1/128+1/256
=1/256