Understanding Maths is a series of topic-based study books for children in Key Stage 2, providing rigorous practice of key subject areas. Each topic contains a concise summary of the information required by the National Curriculum, making the series ideal for use as preparation for the Key Stage 2 tests. Each book is a stand-alone resource, so children can either work through them in order or focus on individual aspects of the subject. Together, the nine books support the whole of the Key Stage 2 maths curriculum, providing a solid foundation for success in maths. Addition & Subtraction meets the National Curriculum requirements for Key Stage 2 maths, and covers the following areas: patterns in calculations, partitioning, finding small differences, inverses, missing number questions, word problems, decimals and questions with long numbers. This book describes in detail the different ways to add and subtract numbers, using both mental and written methods. Key features of Understanding Maths include: an 'Explanation' to introduce each topic; activities to consolidate and revise knowledge and skills; thought-provoking facts to foster a love of learning beyond the National Curriculum; regular 'Progress tests' and a 'Final test' to track children's development.