Mathtrain.TV: Episode 30 - Mathtrain.TV Podcast

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Episode 30. This is the debut of sixth grader, John. John shows us her way of subtracting negative integers! This is part of the Mathtrain.com and Mathtrain.TV Project from Mr. Marcos and his students at Lincoln Middle School, in Santa Monica, CA.

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This episode was published on October 22, 2008.

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