Arithmetic Course/Number System

Number of Base Ten

The number system in use of the ordinary real life is number in of base ten consists of digit from 0 to 9 . Any number greater than 9 can be expressed as

$Ax10^{n}+Bx10^{(n-1)}+...+Zx10^{1}+10^{0}$

For example

$121=1x10^{2}+2x10^{1}+1x10^{0}=100+20+1$

Number of Base Two

The number system in use of the ordinary real life is number in of base ten consists of digit from 0 to 1 . Any number greater than 1 can be expressed as

$Ax2^{n}+Bx2^{(n-1)}+...+Zx2^{1}+2^{0}$

For example

$111=1x2^{2}+2x2^{1}+1x2^{0}=4+2+1=7$