11.2

M A T H 6 | L E S S O N 1 1 . 2 | I D E N T I T Y A N D Z E R O P R O P E R T I E S

Number
Properties &
Equivalent
Expressions

Unit 11

Identity and Zero Properties

CCSS: 6.EE.A.3

1

Lesson 2

Multiple Choice

Is this equivalent

5m + 4 - 2m -3 +m = 8m + 7

• equivalent

• not equivalent

M A T H 6 | L E S S O N 1 1 . 2 | I D E N T I T Y A N D Z E R O P R O P E R T I E S

5

Warm-Up: Answers

The expressions are NOT equivalent!

5𝑚 − 2𝑚 + 𝑚 = 4𝑚

and

4 − 3 = 1

So… 5𝑚 + 4 − 2𝑚 − 3 + 𝑚 = 𝟒𝒎 + 𝟏

Determine whether the following expressions are equivalent. If they
aren’t equivalent, how can you change one of the sides to make
them equivalent?

𝟓𝒎 + 𝟒 − 𝟐𝒎 − 𝟑 + 𝒎 = 𝟖𝒎 + 𝟕

M A T H 6 | L E S S O N 1 1 . 2 | I D E N T I T Y A N D Z E R O P R O P E R T I E S

6

I Do: Identity & Zero Properties

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M A T H 6 | L E S S O N 1 1 . 2 | I D E N T I T Y A N D Z E R O P R O P E R T I E S

8

I Do: Identity & Zero Properties

Identity Property of Addition:
Any number plus zero is the original number. It keeps it’s identity!

Ex: 6 + 0 = 6

Identity Property of Multiplication:
Any number multiplied by one is the original number. It keeps its
identity!

Ex: 6(1) = 6

M A T H 6 | L E S S O N 1 1 . 2 | I D E N T I T Y A N D Z E R O P R O P E R T I E S

9

I Do: Identity & Zero Properties

Zero Property of Multiplication:
Any time you multiply anything by zero, the product is ALWAYS ZERO!

Ex: 6 0 = 0

M A T H 6 | L E S S O N 1 1 . 2 | I D E N T I T Y A N D Z E R O P R O P E R T I E S

1 2

You Do: Identity and Zero Properties

On the next few screens there will be some property examples displayed. You need
to determine which property is being shown and complete the appropriate action
listed below.

Identity Property of Addition

→ Thumbs Up

Identity Property of Multiplication

→ Hand on Head

Zero Property of Multiplication

→ Stand Up

Poll

4 + 0 = 0

• Identity property of addition

• Identity property of multiplication

• Zero property of multiplication

M A T H 6 | L E S S O N 1 1 . 2 | I D E N T I T Y A N D Z E R O P R O P E R T I E S

1 4

You Do: Identity and Zero Properties

𝟒 + 𝟎 = 𝟒

Thumbs Up!

Poll

K (0) = 0

• Identity property of addition

• Identity property of multiplication

• Zero property of multiplication

M A T H 6 | L E S S O N 1 1 . 2 | I D E N T I T Y A N D Z E R O P R O P E R T I E S

1 6

You Do: Identity and Zero Properties

𝒌 𝟎 = 𝟎

Stand Up!

Poll

5 (1) = 5

• Identity property of addition

• Identity property of multiplication

• Zero property of multiplication

M A T H 6 | L E S S O N 1 1 . 2 | I D E N T I T Y A N D Z E R O P R O P E R T I E S

1 8

You Do: Identity and Zero Properties

𝟓 𝟏 = 𝟓

Thumbs Up!

Poll

e + 0 = e

• Identity property of addition

• Identity property of multiplication

• Zero property of multiplication

M A T H 6 | L E S S O N 1 1 . 2 | I D E N T I T Y A N D Z E R O P R O P E R T I E S

2 0

You Do: Identity and Zero Properties

𝒆 + 𝟎 = 𝒆

Hands on

Head!

Poll

4= 4 + 0

• Identity property of addition

• Identity property of multiplication

• Zero property of multiplication

M A T H 6 | L E S S O N 1 1 . 2 | I D E N T I T Y A N D Z E R O P R O P E R T I E S

2 2

You Do: Identity and Zero Properties

𝟒 = 𝟒 + 𝟎

Hands on

Head!

Poll

-4 (0) = 0

• Identity property of addition

• Identity property of multiplication

• Zero property of multiplication

M A T H 6 | L E S S O N 1 1 . 2 | I D E N T I T Y A N D Z E R O P R O P E R T I E S

2 4

You Do: Identity and Zero Properties

−𝟒 𝟎 = 𝟎

Stand Up!

M A T H 6 | L E S S O N 1 1 . 2 | I D E N T I T Y A N D Z E R O P R O P E R T I E S

2 5

QZ Questions

Work on your QZ Questions for the remainder of class!!

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