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Addition Unplugged

Sara JordanEmad GirgisMark Shannon

出版	Sara Jordan Publishing, 1997
主題	Mathematics / Counting & NumerationMathematics / History & Philosophy
ISBN	18955234949781895523492
URL	http://books.google.com.hk/books?id=p2P3AAAACAAJ&hl=&source=gbs_api

註釋

Songs and activities teaching addition.