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A Preview of Properties
By: Ms. Oliva’s 8th grade Math Members
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Commutative Property of Addition
= a+b = b+a = = 7
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Commutative Property of Multiplication
= A (BC)=(BC) A 13(6 x 2)=(6 x 2)13 13 x 12 = 12 x 13 156 = 156
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Associative Property of Addition
= (a + b) + c = a + (b + c) (7 + 5) + 4 = 7 + (5 + 4) = 16 = 16
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ASSOCIATIVE PROPERTY OF MULTIPLICATION
(ab)c = a(bc) (4 x 7)2 = 4 (7 x 2) 28 x 2 = 4 x 14 56 = 56
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Distributive Property
= a (b + c) = ab + ac 7 (5+2) = 7(5) + 7(2) 7 (7) = 49 = 49
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Practice Quiz 1 47 + (95 + 117) = (47 + 95) + 117
Decide what property is shown. Click on your choice. 47 + ( ) = ( ) + 117 A. Associative Property B. Commutative Property C. Distributive Property
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OOPS!! Don’t Cry— Try Again
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Awesome! It looks like you planted just the right answer!
On to the next one
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Practice Quiz 2 (8 x 7)4 = 8(7 x 4) A. Associative Property
Decide what property is shown. Click on your choice. (8 x 7)4 = 8(7 x 4) A. Associative Property B. Commutative Property C. Distributive Property
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Oh my gosh!! That’s not right!
Try Again
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Terrific!! C’est Magnifique!
On to the next one
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Practice Quiz 3 8 (7 – 3) = (8 – 7) (8 – 3) A. Associative Property
Decide what property is shown. Click on your choice. 8 (7 – 3) = (8 – 7) (8 – 3) A. Associative Property B. Commutative Property C. Distributive Property
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OOPS!! Hey! Don’t sweat it! Try Again
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Fantastic!! You’re on your way!
On to the next one
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Practice Quiz 4 15 x 4 = 4 x 15 A. Associative Property
Decide what property is shown. Click on your choice. 15 x 4 = 4 x 15 A. Associative Property B. Commutative Property C. Distributive Property
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OOPS!! I think you zipped through that one too fast!
Try Again
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Way to Go!! You’re just blooming!
On to the next one
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Practice Quiz 5 17(x + y) = 17x + 17y A. Associative Property
Decide what property is shown. Click on your choice. 17(x + y) = 17x + 17y A. Associative Property B. Commutative Property C. Distributive Property
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ARGH!! Better luck next time, mate!
Try Again
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Marvelous!! You really had your eye on that one!
On to the next one
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Practice Quiz 6 (8x – 2) + 14 = 14 + (8x – 2) A. Associative Property
Decide what property is shown. Click on your choice. (8x – 2) + 14 = 14 + (8x – 2) A. Associative Property B. Commutative Property C. Distributive Property
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OOPS!! That was a ghostly error!
Try Again
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Excellent!! You must have eaten your veggies!
On to your last slide!
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You’re on Your Own 14 (2 – 6) = (14 x 2) – (14 x 6) 3x + 17 = 17 + 3x
Answers *Number your paper from 1-8. Write assoc., comm., or dist., to correctly label the property of each. 14 (2 – 6) = (14 x 2) – (14 x 6) 3x + 17 = x 12(4 + 8) = (12 x 4) + (12 x 8) (6 x 5) x 9 = 6 x (5 x 9) 3 + (20 + 4) = (3 + 20) + 4 (11 – 4) + 12 = 12 + (11 – 4) 10( ) = (10 x 22) + (10 x 12) 2x + (3x + 3x) = (2x + 3x) + 3x
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The Answers dist. (Distributive Property) comm. (Commutative Property)
assoc. (Associative Property)
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