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Grade 2,Grade 3,Grade 1,Make use of structure,Inequalities,Grade 4,Teaching strategies,Early Elementary,Visual representation,Representation,Number concepts,Social Sciences,Arithmetic,NSDL,oai:nsdl.org:2200/20140728161126749T,Process skills,Number and operations,Upper Elementary,Algebra,Grade 5,Concept formation,Informal Education,Integers,Whole numbers,Middle School,Vocational/Professional Development Education,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-027,Comparison of numbers,Reason abstractly,Practice Standards,Grade 6,Elementary School,Reason quantitatively,Algebraic thinking,Deductive reasoning,Mathematics,Connections,Engineering,Problem solving,Education,ReasoningLanguage:
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