Well, at its base, sums are just extensions of Boolean operations. You can implement simple logic circuits which compute sums. You can check out http://en.wik

Well, at its base, sums are just extensions of Boolean operations. You can implement simple logic circuits which compute sums. You can check out http://en.wikipedia.org/wiki/Adder_%28electronics%29 http://en.wikipedia.org/wiki/Adder_%28electronics%29 for more information; it describes some simple (and not so simple) circuits for adding two binary numbers.