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What is the origin of "February"?
a unified, sequential system of teaching arithmetic and mathematics in accord with set theory so as to reveal basic concepts: used in some U.S. schools, especially in the 1960s and 1970s.
Based on the Random House Dictionary, © Random House, Inc. 2016.
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British Dictionary definitions for
functioning as sing
) an approach to mathematics in which the basic principles of set theory are introduced at an elementary level
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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