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The National Curriculum and the Scottish Guidelines emphasise the importance of mental calculations in mathematics. This is the last of four small books for junior age children, that give practice in applying basic mathematical skills, and encourage the children to think about all aspects of number. As well as questions of recall and basic mental manipulation, for which answers only are required, there are puzzles and problems to intrigue and fascinate children. Answers to all the questions are given in the accompanying, Mental maths for ages 9 to 11, teachers book. Mental maths 4 has been designed for use with 10-11 year olds, both at school and in the home.