Summary 📝

• Binary numbers use only 1s and 0s.

• Each binary number is made up of 8 bits (1 byte).

• When adding three 8-bit binary numbers, you must line them up like column addition in maths.

• Start from the right-hand bit and add each column, moving left.

• If the total in a column is 2 (10 in binary), write 0 and carry 1.

• If the total is 3 (11 in binary), write 1 and carry 1.

• Repeat this process across all 8 bits.

• If there is a carry at the end, it creates an overflow.

• Overflow happens when the result is too big to fit into 8 bits.

• Computers often ignore the overflow, which can cause errors if not handled correctly.