Binary Addition
Rules:
          1.   0+0=0
          2.   0+1=1
          3.   1+0=1
          4.   1+1=0,1in carry
For Example: 
1.                 Addition of  0101+1010
Therefore it will be: 0101+1010=1111
2.                Addition of 0101+0110
Therefore it will be: 0101+0110=1011
3.                Addition of     00111001+00101001
Therefore it will be: 00111001+00101001=01100010
4.               Addition of       0011+0011
Therefore it will be: 0011+0011=0110
Thus we find the addition of two binary number.
Note: Always remember that carry portion which is 1+1=0, carry 1.
This is so much important while adding two binary numbers