Talk:Computer logic

give on step in program development life cycle?

Question
In the arithmetic introduction the article says 'those whose MSB is 1 are negative' however, later, in the addition section, it add 1111 (15 decimal) to 0101 (5 decimal). Should not 1111 be -15 decimal? Tum Dushul 15:45, 19 November 2009 (UTC)