Binary 1 +1 0 ( carry 1) 1 + 1 = 0 (carry one) 1 + carry 1 0+0 = 0 +1 0+1, 1+0=1 1 ( carry 1) 1 + 1 (+ the carry) = 1 (carry one) 0 + 1, 1+0 (+ the carry) = 0 (carry one) 1 +carry 1 +0 0 ( carry 1) 27