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二进制11110换成十进制
(11110)2
=(((((0*2+1)*2+1)*2+1)*2+1)*2+0)10
=((((1*2+1)*2+1)*2+1)*2+0)10
=(((3*2+1)*2+1)*2+0)10
=((7*2+1)*2+0)10
=(15*2+0)10
=(30)10
(11110)2
=(((((0*2+1)*2+1)*2+1)*2+1)*2+0)10
=((((1*2+1)*2+1)*2+1)*2+0)10
=(((3*2+1)*2+1)*2+0)10
=((7*2+1)*2+0)10
=(15*2+0)10
=(30)10