Adding binary

When two numbers are added together in denary, we take the first number, add the second number to it and get an answer. For example, 1 + 2 = 3.

When we add two binary numbers together the process is different.

There are four rules that need to be followed when adding two binary numbers. These are:

  • 0 + 0 = 0
  • 1 + 0 = 1
  • 1 + 1 = 10 (binary for 2)
  • 1 + 1 + 1 = 11 (binary for 3)

Example

Let’s try adding together two binary numbers: 0101 0011 and 0111 0110.

To get to the answer, use the following method:

Adding the binary numbers 01010011 and 01110110.

1. Starting at the right-hand side, the first sum is 1 + 0 = 1. Put 1 in the answer row below