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Published byLuke Walker Modified over 6 years ago
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Main Idea and New Vocabulary Key Concept: Distributive Property
Example 1: Evaluate Numerical Expressions Example 2: Evaluate Numerical Expressions Example 3: Use the Distributive Property Example 4: Simplify Algebraic Expressions Example 5: Simplify Algebraic Expressions Lesson Menu
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Apply the Distributive Property to rewrite algebraic expressions.
equivalent expressions Main Idea/Vocabulary
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Key Concept
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Evaluate Numerical Expressions
Use the Distributive Property to evaluate the expression 7(3 + 12). 7(3 + 12) = 7 • • 12 Distributive Property = or 105 Multiply. Then add. Answer: 105 Example 1
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Use the Distributive Property to evaluate the expression 4(9 + 3).
C. 4 • • 3; 48 D. 4 • 9 • 3; 108 Example 1 CYP
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Evaluate Numerical Expressions
Use the Distributive Property to evaluate the expression (8 – 5)11. (8 – 5)11 = 8 • 11 – 5 • 11 Distributive Property = 88 – 55 or 33 Multiply. Then subtract. Answer: 33 Example 2
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Use the Distributive Property to evaluate the expression (10 – 3)7.
C. 10 • 7 – 3 • 7; 49 D. 10 • 7 – 3; 67 Example 2 CYP
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Use the Distributive Property
T-SHIRTS Fifteen students are buying T-shirts that cost $10.60 each. Use the Distributive Property to find the total cost of the shirts. Rename $10.60 as $ $0.60. Then use the Distributive Property to find the total cost mentally. 15($10 + $0.60) = 15 • • 0.6 Distributive Property = Multiply. = 159 Subtract. Answer: The total cost of the shirts is $159. Example 3
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PHOTOS Twenty volleyball players and coaches are buying a group photo of their championship win. Each photo costs $ Use the Distributive Property to find the total cost of the photos. A. $206 B. $280.30 C. $286 D. $396 Example 3 CYP
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Simplify Algebraic Expressions
Use the Distributive Property to rewrite the expression (a + 9)4. (a + 9)4 = a(4) + 9(4) Distributive Property = 4a + 36 Simplify. Answer: 4a + 36 Example 4
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Use the Distributive Property to rewrite the expression (d – 6)5.
A. 5d – 6 B. 5d – 30 C. 5d + 6 D. d – 30 Example 4 CYP
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Simplify Algebraic Expressions
Use the Distributive Property to rewrite the expression 8(3 – t). 8(3 – t) = 8[3 + (–t)] Rewrite 3 – t as 3 + (–t). = 8(3) + 8(–t) Distributive Property = 24 + (–8t) Simplify. = 24 – 8t Definition of subtraction Answer: 24 – 8t Example 5
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Use the Distributive Property to rewrite the expression 4(9 – a).
A. 36 – a B. 36 – 4a C. 9 – 4a D a Example 5 CYP
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