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How the Arabs Invented Algebra : The History of Concept of Variables
Tika Downey Rev. ed.. Rosen, 2010 書
Collecting Data : Estimating with Multidigit Numers
Dawn McMillan 1st ed.. Teacher Created Materials, 2008 書
Watch it Grow : Writing, Simplifying and Evaluating Expressions
Lori Barker 1st ed.. Teacher Created Materials, 2012 書
