Comment from Ed Chuhta on 12/13/2009 4:46:00 PM
This Excel demo is useful for instructors and teachers, and students learning about binary numbers and binary math and logic circuits. Here is a special problem to try: 60+90. The truth table for an adder has 2^3 or 8 rows. The problem 60+90 generates each of the 8 rows of the truth table in the first 8 stages of the Excel binary adder.