Splash Screen. Lesson Menu Five-Minute Check (over Lesson 1–2) Then/Now New Vocabulary Key Concept: Properties of Equality Key Concept: Addition Properties.

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Presentation transcript:

Splash Screen

Lesson Menu Five-Minute Check (over Lesson 1–2) Then/Now New Vocabulary Key Concept: Properties of Equality Key Concept: Addition Properties Key Concept: Multiplication Properties Example 1:Evaluate Using Properties Key Concept: Commutative Property Key Concept: Associative Property Real-World Example 2: Apply Properties of Numbers Example 3:Use Multiplication Properties

Then/Now You used the order of operations to simplify expressions. (Lesson 1-2) Recognize the properties of equality and identity. Recognize the Commutative and Associative Properties.

Vocabulary equivalent expressions additive identity multiplicative identity multiplicative inverse reciprocal

KC 1

KC 2

KC 3

Example 1 Evaluate Using Properties Name the property used in each step. Substitution; 12 – 8 = 4 Substitution; 15 ÷ 5 = 3 Substitution; 3 – 2 = 1

Example 1 Multiplicative Identity; 3 ● 1 = 3 = 4Substitution; = 4 Multiplicative Inverse; ● 4 = 1 Answer: 4 Evaluate Using Properties

[Enter question here] A.4 B.5 C.1 D.0

KC 4

KC 5

Example 2 Apply Properties of Numbers HORSEBACK RIDING Migina made a list of trail lengths to find the total miles she rode. Find the total miles Migina rode her horse. Bent TreeKnob HillMeadowrunPinehurst

Example 2 = Commutative (+) = ( ) + ( )Associative (+) = Substitution = 27.50Substitution Answer: Migina rode 27.5 miles on the trails. Apply Properties of Numbers

[Enter question here] A.4.5 mi B.5.5 mi C.6.0 mi D.6.2 mi TRANSPORTATION Darlene rode the city train from the Winchester Street Station to the airport. How far did she travel on the train?

Example 3 Use Multiplication Properties Evaluate 2 ● 8 ● 5 ● 7 using properties of numbers. Name the property used in each step. You can rearrange and group the factors to make mental calculations easier. Answer: ● 8 ● 5 ● 7= 2 ● 5 ● 8 ● 7Commutative (×) = (2 ● 5) ● (8 ● 7)Associative (×) = 10 ● 56Multiply mentally. = 560Multiply mentally.

[Enter question here] A.45 B.36 C.15 D.180 Evaluate 3 ● 5 ● 3 ● 4.

End of the Lesson

A.A B.B C.C D.D Example 1 A.4 B.5 C.1 D.0

A.A B.B C.C D.D Example 2 A.4.5 mi B.5.5 mi C.6.0 mi D.6.2 mi TRANSPORTATION Darlene rode the city train from the Winchester Street Station to the airport. How far did she travel on the train?

A.A B.B C.C D.D Example 3 A.45 B.36 C.15 D.180 Evaluate 3 ● 5 ● 3 ● 4.