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Add & Subtract Positive & Negative Numbers

January 12th, 2009
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This lesson teaches a method for adding and subtracting positive and negative numbers. (Other than the number-line method)

Transcript: coming soon!

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  1. Marguerite
    August 24th, 2010 at 17:56 | #1
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    Oh Wow!! I can pass my math class now. Thank you for the video

  2. marta
    January 19th, 2012 at 11:23 | #2
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    do rules of addition and subtraction of postivie and negative number applies to muliplication and division of positive and negative number?

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