Section 2.6 Day #1

Section 2.6 Does Order Matter? Rewriting Expressions

GOAL: To solidify our understanding of the commutative and associative property

Multiple Choice

x + 18 = 18 + x is an example of the ___ property

• associative

• commutative

• neither

• both

Multiple Choice

(uy)*z = u*(yz) is an example of the ___ property

• associative

• commutative

• neither

• both

Multiple Choice

Which of the following shows the COMMUTATIVE property at work?

(x + y) + z = 

• x + (y + z)

• x + y + z

• z + (x + y)

• None of these

Multiple Choice

Which property should be used first if the goal is to combine like terms?

3x + (5y - 3x)

• Associative Property of Multiplication

• Commutative Property of Addition

• Associative Property of Addition

• Commutative Property of Multiplication

Multiple Choice

Now that you have used to the commutative property of addition to rewrite as;

(5y - 3x) + 3x

now what do you apply? What do we simplify to?

• Associative Property of Multiplication; 15xy + 3x

• Commutative Property of Addition; 5y + 6x

• Associative Property of Addition; 5y

• Commutative Property of Multiplication; 5y

Multiple Choice

Which of the following shows the ASSOCIATIVE property at work?

(x + y) + z = 

• x + (y + z)

• x + y + z

• z + (x + y)

• None of these

Multiple Choice

Simplify using the associative and commutative properties; 4y + 3 + 7y

• 11y + 3

• 7y + 7

• 28 y + 3

• 11y + 9

Multiple Choice

Simplify by combining like terms:
5a + 2b - 3a + 4

• 8a + 2b + 4
• 2a + 2b + 4
• 8ab
• 4ab + 4

Multiple Choice

Simplify by combining like terms;

n -10 +9n -3=

• -3
• 9n-3
• n
• 10n -13

Multiple Choice

Subtract the polynomials;

(7x²-5x+3)-(2x²-2x-1)

• 5x²-7x+2
• 9x²-3x+4
• 5x²+7x+2
• 6x²+2

Multiple Choice

Add the like terms;

(-9x²+12x-15)+(4x²-7x+10)

• -5x²+5x-5
• 5x²+5x+23
• 3x²-3x-5
• -10x²-5