Sir Isaac Newton - Father of Classical Physics
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Agapito Flores - Invented the Fluorescent Lamp
Thursday, July 19, 2012
Wednesday, July 18, 2012
Multiplication of Integers
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| math board |
If the signed numbers have like sign, multiply the numbers and copy the common sign. (+) . (+) = (+), (-) . (-) = (+),otherwise, the sign is negative. (-) . (+) = (-), (+) . (-) = (-).
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