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• What is the total of my hand?
• How would we write this as multiplication?
• What is the total of my hand?
• How would we write this as multiplication?
Modeling with Integer Chips
3x4
3 x -4
-3 x 4
-3 x -4
• Generate real-world situations that can be
modeled by each of the following
multiplication problems.
• a. −3 × 5
• b. −6 × (−3)
• c. 4 × (−7)
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
Try Some
6  8
4  3
2  6
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?
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?