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Grade 6,NSDL,Grade 4,Grade 5,Addition,Express regularity,Representation,Number concepts,Social Sciences,Arithmetic,Concept formation,Connections,Number and operations,Inductive reasoning,Algebra,Angle measure,Angles,Visual representation,Informal Education,Whole numbers,Middle School,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-027,Geometry,Comparison of numbers,Practice Standards,Mental calculation,Elementary School,Reason quantitatively,Algebraic thinking,Operations,oai:nsdl.org:2200/20140728160840312T,Sequences and series,Upper Elementary,Mathematics,Reasoning,Plane geometry,Problem solving,Measurement,Process skills,Education,PolygonsLanguage:
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