Upload
ehren
View
77
Download
0
Tags:
Embed Size (px)
DESCRIPTION
How can we use the Commutative and Associative Properties to transform the expression 25 x (-16 x -4) into (25 x -4) x -16?. In this lesson you will learn to solve multiplication problems by using the Commutative and Associative P roperties. Associative Property of Multiplication. - PowerPoint PPT Presentation
Citation preview
How can we use the Commutative and Associative
Properties to transform the expression 25 x (-16 x -4) into
(25 x -4) x -16?
In this lesson you will learn to solve multiplication problems
by using the Commutative and Associative Properties.
Let’s Review
If a, b and c are rational numbers then a x (b x c) = (a x b) x c
Associative Property of Multiplication
Let’s Review
If a and b are rational numbers then a x b = b x a
Commutative Property of Multiplication
A Common Mistake
25 x (-16 x -4) = (25 x -4) x -16
Core Lesson
Multiply inside the parentheses
Multiply
Core Lesson
Apply Associative Property
Multiply inside the parenthesesMultiply
Apply Commutative
Property
Core Lesson
Multiply
Multiply first two numbers
Core Lesson
Apply Associative Property
Apply Associative Property
Apply Commutative Property
Core Lesson
Multiply inside the parentheses
Multiply
Multiply
Core Lesson
Multiply inside the parentheses
Multiply
Core Lesson
Apply Associative Property
Multiply what’s in the parentheses
Multiply
Apply Commutative
Property
Core Lesson
Multiply
Multiply inside the parentheses
Core Lesson
Apply Associative Property
Multiply inside the parentheses
Multiply
Apply Commutative
Property
In this lesson you have learned to solve multiplication problems by using the
Commutative and Associative Properties.
Guided Practice
1. Using the Commutative and Associative Properties, solve the following problem:
Guided Practice
2. Using the Commutative and Associative Properties, solve the following problem:
Extension Activities
1. Show each step and name the properties that transform 19 x -4 x 5 to 5 x -4 x 19.
Extension Activities
2. Use the commutative and associative properties to transform a x b x x d into d x c x b x a.
Quick Quiz
1. Using the associative property, solve the following problem:
2. Using the associative property, solve the following problem: