Splash Screen. Lesson Menu Five-Minute Check (over Lesson 1–3) Then/Now New Vocabulary Key Concept: Distributive Property Example 1: Real-World Example:

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1-4: The Distributive Property

Algebra 1 Notes: Lesson 1-6: Commutative and Associative Properties

Which property is demonstrated in the equation 8 • 0 = 0?

The Distributive Property

Presentation transcript:

Splash Screen

Lesson Menu Five-Minute Check (over Lesson 1–3) Then/Now New Vocabulary Key Concept: Distributive Property Example 1: Real-World Example: Distribute Over Addition Example 2:Mental Math Example 3:Algebraic Expressions Example 4:Combine Like Terms Example 5:Write and Simplify Expressions Concept Summary: Properties of Numbers

Over Lesson 1–3 A.A B.B C.C D.D 5-Minute Check 1 A.Multiplicative Property of Zero B.Multiplicative Inverse C.Commutative Property D.Identity Which property is demonstrated in the equation 8 0 = 0?

Over Lesson 1–3 A.A B.B C.C D.D 5-Minute Check 2 A.Associative Property B.Multiplicative Inverse C.Commutative Property D.Substitution What property is demonstrated in the equation 7 + (11 – 5) = 7 + 6?

Over Lesson 1–3 A.A B.B C.C D.D 5-Minute Check 3 A.2 B.1 C.0 D.–1

Over Lesson 1–3 A.A B.B C.C D.D 5-Minute Check 4 A.Commutative Property B.Identity Property C.Associative Property D.Distributive Property Name the addition property shown by (6 + 9) + 8 = 6 + (9 + 8).

Then/Now You explored Associative and Commutative Properties. (Lesson 1–3) Use the Distributive Property to evaluate expressions. Use the Distributive Property to simplify expressions.

Vocabulary like terms simplest form coefficient

Concept

Example 1 Distribute Over Addition FITNESS Julio walks 5 days a week. He walks at a fast rate for 7 minutes and cools down for 2 minutes. Use the Distributive Property to write and evaluate an expression that determines the total number of minutes Julio walks. UnderstandYou need to find the total number of minutes Julio walks. PlanJulio walks for or 9 minutes a day. SolveWrite an expression that shows the product of the minutes Julio walks for 5 days.

Example 1 Distribute Over Addition 5(7 + 2)=5(7) + 5(2)Distributive Property = Multiply. =45Add. Answer: Julio walks 45 minutes a week. Check: Use estimation to check your answer. The total number of days he walks is 5 days and he walks 9 minutes per day. Multiply 5 by 9 to get 45. Therefore, he walks 45 minutes per week.

A.A B.B C.C D.D Example 1 A ● 10; 65 minutes B.5 ● ; 85 minutes C.5 ● ● 10; 125 minutes D ; 25 minutes WALKING Susanne walks to school and home from school 5 days each week. She walks to school in 15 minutes and then walks home in 10 minutes. Rewrite 5( ) using the Distributive Property. Then evaluate to find the total number of minutes Susanne spends walking to and home from school.

Example 2 Mental Math Use the Distributive Property to find 12 ● 82. Then evaluate. 12 ● 82=12(80 + 2)Think: 82 = =12(80) + 12(2)Distributive Property = Multiply. =984 Add. Answer: 984

A.A B.B C.C D.D Example 2 A.300 B.24 C.324 D.6(50 + 4) Use the Distributive Property to find 6 ● 54.

–Each group will have a property to identify –Assign a speaker for your group –As each problem gets posted, check to see if it is your assigned property –Discuss and have your speaker alert the class it is your property –Speaker will explain why PROPERTIES ACTIVITY

(156)12 = 15 (612) PROPERTIES ACTIVITY

4 + 0 = 4 PROPERTIES ACTIVITY

491 = 49 PROPERTIES ACTIVITY

58+1 = 40+1 PROPERTIES ACTIVITY

3420 = 0 PROPERTIES ACTIVITY

5(2+9) = PROPERTIES ACTIVITY

(9+3)+8 = 9+(3+8) PROPERTIES ACTIVITY

4911 = 1194 PROPERTIES ACTIVITY

8+6 = 6+8 PROPERTIES ACTIVITY

Example 3 Algebraic Expressions A. Rewrite 12(y + 3) using the Distributive Property. Then simplify. 12(y + 3)=12 ● y + 12 ● 3Distributive Property =12y + 36Multiply. Answer: 12y + 36

Example 3 Algebraic Expressions B. Rewrite 4(y 2 + 8y + 2) using the Distributive Property. Then simplify. 4(y 2 + 8y + 2)= 4(y 2 )+ 4(8y) + 4(2)Distributive Property = 4y y + 8Multiply. Answer: 4y y + 8

A.A B.B C.C D.D Example 3 A.6x – 4 B.6x – 24 C.x – 24 D.6x + 2 A. Simplify 6(x – 4).

A.A B.B C.C D.D Example 3 A.3x 3 + 2x 2 – 5x + 7 B.4x 3 + 5x 2 – 2x + 10 C.3x 3 + 6x 2 – 15x + 21 D.x 3 + 2x 2 –5x +21 B. Simplify 3(x 3 + 2x 2 – 5x + 7).

Example 4 Combine Like Terms A. Simplify 17a + 21a. 17a + 21a = ( )aDistributive Property = 38aSubstitution Answer: 38a

Example 4 Combine Like Terms B. Simplify 12b 2 – 8b 2 + 6b. 12b 2 – 8b 2 + 6b = (12 – 8)b 2 + 6bDistributive Property = 4b 2 + 6bSubstitution Answer: 4b 2 + 6b

A.A B.B C.C D.D Example 4 A.5x 2 B.23x C.5 D.5x A. Simplify 14x – 9x.

A.A B.B C.C D.D Example 4 A.6n n B.21n 2 C.6n n D.62n 2 B. Simplify 6n 2 + 7n + 8n.

Example 5 Write and Simplify Expressions Use the expression six times the sum of x and y increased by four times the difference of 5x and y. A. Write an algebraic expression for the verbal expression. Answer: 6(x + y) + 4(5x – y)

Example 5 Write and Simplify Expressions B. Simplify the expression and indicate the properties used. 6(x + y) + 4(5x – 4) = 6(x) + 6(y) + 4(5x) – 4(y) Distributive Property = 6x + 6y + 20x – 4yMultiply. = 6x + 20x + 6y – 4yCommutative (+) = (6 + 20)x + (6 – 4)yDistributive Property = 26x + 2ySubstitution Answer: 26x + 2y

A.A B.B C.C D.D Example 5 A.3(2x + y) + 2(4x – y) B.3(2x – y) + 2(4x + y) C.2(2x – y) + 3(4x + y) D.3(x – 2y) + 2(4x + y) Use the expression three times the difference of 2x and y increased by two times the sum of 4x and y. A. Write an algebraic expression for the verbal expression.

A.A B.B C.C D.D Example 5 A.2x + 4y B.11x C.14x – y D.12x + y B. Simplify the expression 3(2x – y) + 2(4x + y).

Concept

End of the Lesson