Question

二进制数11111化成十进制数

Answer 1

(11111)2
=(((((0*2+1)*2+1)*2+1)*2+1)*2+1)10
=((((1*2+1)*2+1)*2+1)*2+1)10
=(((3*2+1)*2+1)*2+1)10
=((7*2+1)*2+1)10
=(15*2+1)10
=(31)10