1. Quick Start Expectations
Fill in planner and HWRS HW: p #10-13, 38-41
Complete answers: Show your Work!
Get a signature on your HWRS
On desk: math journal, HWRS, pencil
Warm Up:
In your journal: /23/14
Investigation 3: Multiplying and Dividing Rational Numbers
AN 3.2 Multiplication of Rational Numbers
What algorithm can you use for
multiplying integers?

3. Positive Factors
One Negative Factor
Two Negative Factors

4. +6
Yes, multiplication is commutative! The order of the factors doesn’t matter. +6
- 6
Positive x Positive = Positive
Positive x Negative = Negative
Negative x Positive = Negative

5. Negative x Negative = Positive
When there are zero or an even number of negative factors , the product is positive!
When there is one or an odd number of negative factors, the product is negative!

6. Positive
Negative
Positive
Negative
Positive
When there are zero or an even number of negative factors , the product is positive!
When there is one or an odd number of negative factors, the product is negative!

7. Multiplying Integers - Rules
Positive x Positive = Positive
Positive x Negative = Negative
Negative x Positive = Negative
Negative x Negative = Positive

8. How do the products change as the numbers multiplied by 5 decrease?
As the number multiplied by 5 decreases by 1,
the product decreases by 5

9. With each equation, there is one fewer group of 5.
5 less than 0 is -5
10 less than 0 is -10
15 less than 0 is -15

10. The product increases each time because you are accumulating fewer negatives (one less group of -4)

11. Each of the products is the opposite of the product of 4 and a negative number.

12. Complete answers: Show your Work!
Homework
p #10-13, 38-41
Complete answers: Show your Work!