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1-4: The Distributive Property
Essential Skills: Use the distributive property to evaluate expressions Use the distributive property to simplify expressions
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1-4: The Distributive Property
For any numbers a, b, and c a(b + c) = ab + ac and (b + c)a = ab + ac a(b – c) = ab – ac and (b – c)a = ab – ac Take the number outside the parenthesis and distribute (multiply) it with ALL the terms inside the parenthesis Example 3(2 + 5) = 3 ● ● = = 21
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1-4: The Distributive Property
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. 5 days of 7 minutes plus 2 minutes 5(7 + 2) 5 ● ● 2 45 minutes
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1) Rewrite 5(15 + 10). Then evaluate
● 10; 65 5 ● ; 85 5 ● ● 10; 125 ; 25 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
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1-4: The Distributive Property
Mental Math Use the Distributive Property to rewrite 12 ● 82. Then evaluate. Think: 12 = (10 + 2)(82) 10 ● ● 82 984
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2) Use the Distributive Property to rewrite 6 ● 54. Then evaluate
6(50); 300 6(50 ● 4); 1200 6(50 + 4); 324 6(50 + 4); 624 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
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1-4: The Distributive Property
Rewrite 12(y + 3) using the Distributive Property. Then simplify. 12(y + 3) 12 ● y + 12 ● 3 12y + 36
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1-4: The Distributive Property
Rewrite 4(y2 + 8y + 2) using the Distributive Property. Then simplify. 4(y2 + 8y + 2) 4 ● y2 + 4 ● 8y + 4 ● 2 4y2 + 32y + 8
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3) Simplify 6(x – 4) 6x – 4 6x – 24 x – 24 6x + 2 1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
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4) Simplify 3(x3 + 2x2 – 5x + 7) 3x3 + 2x2 – 5x + 7
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
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1-4: The Distributive Property
The Distributive Property (in reverse) is how we can combine like terms Simplify 17a + 21a 17a + 21a = ( )a = 38a Simplify 12b2 – 8b2 + 6b 12b2 – 8b2 + 6b = (12 – 8)b2 + 6b = 4b2 + 6b
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5) Simplify 14x – 9x 5x2 23x 5 5x 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
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6) Simplify 6n2 + 7n + 8n 6n2 + 15n 21n2 6n2 + 56n 62n2 1 2 3 4 5 6 7
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
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1-4: The Distributive Property
Simplify the expression six times the sum of x and y increased by four times the difference of 5x and y. Write verbal expression as an algebraic expression 6(x + y) + 4(5x – y) Distribute 6x + 6y + 20x – 4y Combine like terms 6x + 20x + 6y – 4y (6 + 20)x + (6 – 4)y 26x + 2y
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7) Simplify the expression: three times the difference of 2x and y increased by two times the sum of 4x and y 2x + 4y 11x 14x – y 12x + y 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
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Participant Scores 7 Cody Cremeans David Farrell Madison Dale
Hunter Wimmersberger Katerah Ward
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1-4: The Distributive Property
Assignment Page 29 1 – 47, odds
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