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Understanding Maths is a series of books designed to reinforce skills and knowledge at Key Stage 2 of the National Curriculum. Each book focuses on a particular maths topic with explanations and teaching points, exercises, answers section and glossary of terms. Adding and Subtracting describes in detail the different ways to add and subtract numbers, using both mental and written methods. There are plenty of examples and practical activities - plus some fascinating facts to explain how numbers work, which can be used to help make arithmetic easier. The Adding and Subtracting book includes: adding and subtracting multiples, 'double' numbers, partitioning numbers into tens and units and written methods of addition and subtraction (including decimals and money).