Lesson 1.6: Multiplying Integers

Lesson 1.6:
Multiply Integers

Definitions:

Distributive Property:
a (b + c) = ab + ac
or
2 (3 + 5) = 2*3 + 2*5
Identity Property: Any number times (or divided by) 1 will give you back that number.
1 * a = a
or
1 * 5 = 5

Today's Goal:

In today's lesson we are going to master multiplying integers. We are going to learn when our product is going to be positive and when our product is going to be negative.

​Rules:

​Even Number of Negative Signs ==> Positive
Odd Number of Negative Signs ==> Negative
or...

​Example: -5 X -8

Multiple Choice

-6 X -4

• 24

• -24

• 10

• -10

Multiple Choice

5 X -8

• -3

• -13

• 40

• -40

​Determine the sign of each product:

​5 X -8


-7 X -9

-5 X -8 X 7


6 X -4 X -5

Multiple Choice

Will the product be positive or negative?

-4 X -5 X -6

• Positive

• Negative

​Conclusion: Two complete sentences about what you learned.

​Today I learned when I multiply two integers with the same sign the product will be _____.
When I multiply two integers with different signs the product will be ____.