lesson 2-4 pages 75-79
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Lesson 2-4 Pages 75-79
Multiplying Integers
What you will learn!1. How to multiply integers.
2. How to simplify algebraic expressions.
What you really need to know!
The product of two integers with different signs is negative.
The product of two integers with the same sign is positive.
Example 1:
Find each product:
8(-12) = -96
-9(11) = -99
Example 2:
Find the product:
-4(-16) = 64
Example 3:
Find the product:
-7(11)(-2) = 154
Example 4:
A student missed only 4 problems on a test, each worth 20 points. What is the total number of points missed?
A. -5 B. -20 C. 24 D. -80
Example 5:
Simplify: -7(6k)
(-7•6)k
-42k
Example 6:
Simplify:8a(-5b)
(8•-5)ab
-40ab
Example 7:
Evaluate: -3xy if x = -4 and y = 9
-3(-4)(9)
108
Page 77
Guided Practice
#’s 4-15
Pages 75-77 with someone at home
and study examples!
Read:
Homework: Pages 78-79
#’s 16-54 even
#’s 59-85
Lesson Check 2-4
Page
727
Lesson 2-4
Lesson Check 2-4
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