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Why is the Product of Negative Numbers Positive? (Question Corner and Discussion Area)

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Visit this site: http://www.math.toronto.edu/mathnet/questionCorner/minustimesaminus.html
Author:University of Toronto Mathematics Network
Description: A short essay and a description of a practical demonstration.
Levels: Middle School (6-8), High School (9-12)
Languages: English
Math Topics: Negative Numbers

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