GCSE EDEXCEL Topic 2A Adding two 8 bit binary integers This video explains how an arithmetic logic unit can add up to two 8 bit binary numbers together. The electronics needed to create these circuits is explored further at A’level. Also in this topic... GCSE EDEXCEL Topic 2A Bit patterns GCSE EDEXCEL Topic 2A Number bases GCSE EDEXCEL Topic 2A Signed integers using two’s complement GCSE EDEXCEL Topic 2A Binary shifts GCSE EDEXCEL Topic 2A Why hexadecimal is used in computer science