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Secret Maths Subtraction
Michael O'Mara Books, Limited
出版Michael O'Mara Books, Limited, 2004-01-05
ISBN19046132849781904613282
URLhttp://books.google.com.hk/books?id=5GVZAAAACAAJ&hl=&source=gbs_api
註釋With its detachable decoder children can use the books in this mathematicseries to teach and test themselves without writing in the book itself. Eachitle is illustrated with a detective theme and the aim is to help them learnathematics in a fun and novel way.