Question

二分之一加四分之一加八分之一加十六分之一加三十二分之一（简便运算）？

Answer 1

1/2+1/4+1/8+1/16+1/32
=1/2+1/4+1/8+1/16+1/32—1/32+1/32
=1/2+1/4+1/8+1/16+1/16-1/32
=1/2+1/4+1/8+1/8-1/32
=1/2+1/4+1/4-1/32
=1/2+1/2-1/32
=1-1/32
=31/32