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11/18/13 Module 2, Lesson 11
HW: Lesson 11 Problem Set #1-4
and CRS 8 due tomorrow
Do Now:
Exit Ticket For Lesson 10
Develop Rules for
Multiplying Signed Numbers

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Problem Set 10 Answer Key

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Problem Set 10 Answer Key

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Part B: Complete quadrant 2 of the table.
What relationships or patterns do you notice between the
products (values) in quadrant two and the products (values) in
quadrant 1?
What relationships or patterns do you notice between the
products (values) in quadrant two and the products
(values) in quadrant four?
Use what you know about the products (values) in
quadrant one, two, and four to describe what quadrant
three will look like when its products (values) are entered.
a.
b.
c.
1 2 3 4 5
2 4 8 10
3 6 9 12 15
4 8 12 16 20
5 10 15 20 25
­1 ­2 ­3 ­4 ­5
­2 ­4 ­6 ­8 ­10
­3 ­6 ­9 ­12­15
­4 ­8 ­12­16­20
­5 ­10­15­20­25
­1­2­3­4­5
­1­2­3­4­5
­2­4­6­8­10
­3­6­9­15­12
­4­8­12­16­20
­5­10­15­20­25

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Part C: Complete the quadrant 3 of the table.
Refer to the completed table to help you answer the following questions:
f. Is it possible to know the sign of a product of two
integers just by knowing in which quadrant each integer
is located? Explain.
g. Which quadrants contain which values? Describe
an integer game scenario represented in each
quadrant. 1 2 3 4 5
2 4 8 10
3 6 9 12 15
4 8 12 16 20
5 10 15 20 25
­1 ­2 ­3 ­4 ­5
­2 ­4 ­6 ­8 ­10
­3 ­6 ­9 ­12­15
­4 ­8 ­12­16­20
­5 ­10­15­20­25
­1­2­3­4­5
12345
246810
3691215
48121620
510152025
­1­2­3­4­5
­2­4­6­8­10
­3­6­9­15­12
­4­8­12­16­20
­5­10­15­20­25

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We have used the Integer Game to explain that adding a number multiple times has the same effect as
removing the opposite value the same number of times. What is (­1) (­1) ?x
Why are 1 and ­1 called additive inverses? Write an equation that shows this property.

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1.) A submarine is diving from the surface of the water at a
rate of 90 feet per minute. What is the depth after 7
minutes?
2.) If I own 100 shares of Apple stock and the price drops
by $3 per share, what is the change in my investment?
Write an expression.
3.) -4(3) = 4.) -5(-7) = 5.) 7(-3) = 6.) -9(-5) =

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CLOSING:
• Why does the product of two negative values result in a positive
value? Explain using the Integer Game.
• How do we determine if the product of two signed numbers will be
positive or negative?

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