What is a surd and Manipulating Surds powerpoint

suitable for KS4 and core 1. Introducing surds and the rules for manipulating and simplifying surds. Can be printed out as a worksheet. Multiplying and dividing surds together with short sets of questions to practise each rule. Example to show that (different) surds cannot be added. Exam question to finish. Picture on title slide is 'square roots' (worth asking the class what it is a picture of - if they like bad jokes!)