Adding and SubtractingPaperback, 1 October 2001

-- Children learn math concepts as they play with the puzzles, quizzes, and games in these fresh, entertaining, and cleverly designed books.
-- Teachers, librarians, and parents will welcome the active approach to basic math that helps children understand and retain basic principles.
-- The authors use their teaching experience to give a real sense of fun and magic to math, and the ideas that underlie mathematical activity.