Visualizing Simple Addition and Multiplication

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One of the elements of the National Council of Teachers of Mathematics (NCTM) number and operations standard for grades pre-K-2 is that students be able to "understand the effects of adding...whole numbers...". This Demonstration allows students (and their teachers) to explore whole number addition and multiplication on a hundred board.

Contributed by: Chris Boucher (March 2011)
Open content licensed under CC BY-NC-SA


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