This interactive Java applet develops logical reasoning skills and fluency with two-digit addition. The game board consists of a ring of seven overlapping circles, each with 3 regions. Numbers are provided in five regions. The player drags 9 other numbers to the empty regions so that the sum of the numbers within each circle is 99.
Keywords:Grade 2,Grade 3,NSDL,Grade 4,Grade 5,Addition,Early Elementary,Reason quantitatively,Number concepts,Social Sciences,Arithmetic,Analyze and persevere,Process skills,Number and operations,Upper Elementary,oai:nsdl.org:2200/20140728161225713T,Subtraction,Life Science,Composition and decomposition of numbers,Informal Education,Whole numbers,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-027,Comparison of numbers,Practice Standards,Deductive reasoning,Elementary School,Strategies,Chemistry,Operations,Mental calculation,Number sense,Mathematics,Problem solving,Education,Reasoning