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Adding and Subtracting Puzzles (Usborne Math Skills)
Adding and Subtracting Puzzles - Usborne Math Skills Author:Karen Bryant-Mole, Robyn Gee, Graham Round A children's book that teaches addition and subtraction skills.This lively new series is designed to help you with basic and essential skills. Enter the eccentric 'Stone Age' world of the Og family and have fun helping them play their games, solve their problems and correct their mistakes.