There are a few simple rules you need to remember when adding Binary numbers.

  • When adding a 0 and a 0 = 0
  • When adding a 1 and a 0 = 1
  • When adding a 0 and a 1 = 1
  • When adding a 1 and 1 = 0 and carry the 1 to the next number to the left
  • When adding 3 ‘1’s’ = two 1’s and carry the 1 to the next number to the left

adding binary

In this example of binary addition you can see that the 1 has been carried to the next number to the left as it was two 1’s being added.

binary additon 2

However here, you can see all of the examples of binary addition that I have included above being used.