Multiply a Positive Integer by a Negative Integer by Thinking About Equal Groups

This Multiply a Positive Integer by a Negative Integer by Thinking About Equal Groups video also includes:

The rule says that the product of a positive and negative is always negative, but how do you show that? This video demonstrates how we take a negative number and multiply it by a positive to get more groups of negatives. A product box is used with plus and minus signs to represent the integers. This is the third video in a six-part series. Use the next video to show multiplication when the negative is first. 

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CCSS: Designed
Classroom Considerations

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Pros

  • Uses a visual to demonstrate the product of a positive and negative
  • Use extension activities in slides for more practice and a quick quiz
  • Notes template provided as a graphic organizer
Cons

  • Does not show examples when the negative number comes first
Common Core