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Postscript
postscript: Arithmogons

 

October 2013, Volume 20, Issue 3, Page 208

Abstract:
Easy-to-design puzzles that encourage mathematical reasoning and promote numerical fluency, arithmogon puzzles are simple: Add the numbers in two circles to get the number in the square. Every month, this final page of the journal highlights a quick game, puzzle, activity, or instructional strategy and suggestions for teachers of different grade bands to use the idea in the classroom.

Keywords:
Article
Problem Solving / Problem Posing
Reasoning and Proof
Number Patterns