Back to Binary Addition Labs: Cryptography. Part 1.

Binary Addition. Example 3.


Problem: 100101 + 10101 = ?.

Answer: 100101 + 10101 = 111010.

Explanation:

100101
+10101


first column (from the right!) : 1 + 1 = 0 carry 1
second column : 0 + 0 + 1 (carried) = 1
third column : 1 + 1 + no carry = 0 carry 1
fourth column : 0 + 0 + 1 (carried) = 1
fifth column : 0 + 1 + no carry = 1
sixth column : 1 + 0 + no carry = 1

Therefore the answer is 1 1 1 0 1 0!


Back to Binary Addition Last Modified: August 2008