GCSE EDEXCEL Topic 2A Signed integers using two’s complement In this video we take a look at how to represent signed binary integers using the two’s complement method. Also in this topic... GCSE EDEXCEL Topic 2A Number bases GCSE EDEXCEL Topic 2A Converting between denary and 8 bit binary GCSE EDEXCEL Topic 2A Binary shifts GCSE EDEXCEL Topic 2A Converting between denary and 2 digit hexadecimal GCSE EDEXCEL Topic 2A Why hexadecimal is used in computer science