1-1/2-1/4-1/8-1/16-1/32-1/32+1/32 =1-1/2-1/4-1/8-1/16-1/16+1/32 =1-1/2-1/4-1/8-1/8+1/32 =1-1/2-1/4-1/4+1/32 =1-1/2-1/2+1/32 =1-1+1/32 =0+1/32 =1/32