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What is the total of my hand? How would we write this as multiplication?

Explore how to write multiplication expressions using integers and model real-world situations. Learn the rules for multiplying integers and understand when the product is positive or negative. Complete an exit ticket to test your understanding.

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What is the total of my hand? How would we write this as multiplication?

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  1. What is the total of my hand? • How would we write this as multiplication?

  2. What is the total of my hand? • How would we write this as multiplication?

  3. Modeling with Integer Chips 3 x 4

  4. 3 x -4

  5. -3 x 4

  6. -3 x -4

  7. Generate real-world situations that can be modeled by each of the following multiplication problems. • a. −3 × 5 • b. −6 × (−3) • c. 4 × (−7)

  8. The Rules • There are only two rules to follow: • Multiplying or dividing integers with the same sign, the outcome is positive • Multiplying or dividing integers with different signs, the outcome is negative

  9. Try Some

  10. Closure • How do we determine if the product of two signed numbers will be positive or negative? • Why does the product of two negative values result in a positive value?

  11. Exit Ticket • 1. Create a real-life example that can be modeled by the expression −2 × 4, and then state the product. • 2. Two integers are multiplied, and their product is a positive number. What must be true about the two integers?

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