Fun with num3ers
Friday, April 15, 2011
Number Line Tightrope
http://mathmidway.org/Training/numberline.php
http://mathmidway.org/Training/pdf/numberlineTourGuide.pdf
http://mathmidway.org/math-midway-puzzles-century1.php
http://en.wikipedia.org/wiki/Triangular_number
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