a preview of properties by: ms. oliva’s 8 th grade math members
TRANSCRIPT
A Preview of Properties
By: Ms. Oliva’s 8th grade
Math Members
Commutative Property of Addition
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a+b = b+a 3+4 = 4+3
7 = 7
Commutative Property of Multiplication
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Associative Property of Addition
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(a + b) + c = a + (b + c)
(7 + 5) + 4 = 7 + (5 + 4)
12 + 4 = 7 + 9
16 = 16
ASSOCIATIVE PROPERTY OF MULTIPLICATION
(ab)c = a(bc)(4 x 7)2 = 4 (7 x 2)
28 x 2 = 4 x 1456 = 56
Distributive Property
a (b + c) = ab + ac
7 (5+2) = 7(5) + 7(2)
7 (7) = 35 + 14
49 = 49
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Practice Quiz 1
Decide what property is shown. Click on your choice.
47 + (95 + 117) = (47 + 95) + 117
C. Distributive Property
B. Commutative Property
A. Associative Property
OOPS!!
Don’t Cry— Try Again
Awesome! It looks like you planted just the
right answer!
On to the next one
Practice Quiz 2
Decide what property is shown. Click on your choice.
(8 x 7)4 = 8(7 x 4)
C. Distributive Property
B. Commutative Property
A. Associative Property
Oh my gosh!! That’s not right!
Try Again
Terrific!! C’est Magnifique!
On to the next one
Practice Quiz 3
Decide what property is shown. Click on your choice.
8 (7 – 3) = (8 – 7) (8 – 3)
C. Distributive Property
B. Commutative Property
A. Associative Property
OOPS!! Hey! Don’t sweat it!
Try Again
Fantastic!! You’re on your
way!
On to the next one
Practice Quiz 4
Decide what property is shown. Click on your choice.
15 x 4 = 4 x 15
C. Distributive Property
B. Commutative Property
A. Associative Property
OOPS!! I think you zipped through that one too fast!
Try Again
Way to Go!!You’re just blooming!
On to the next one
Practice Quiz 5
Decide what property is shown. Click on your choice.
17(x + y) = 17x + 17y
C. Distributive Property
B. Commutative Property
A. Associative Property
ARGH!! Better luck next time, mate!
Try Again
Marvelous!!You really had your
eye on that one!
On to the next one
Practice Quiz 6
Decide what property is shown. Click on your choice.
(8x – 2) + 14 = 14 + (8x – 2)
C. Distributive Property
B. Commutative Property
A. Associative Property
OOPS!! That was a ghostly error!
Try Again
Excellent!!You must have
eaten your veggies!
On to your last slide!
You’re on Your Own*Number your paper from 1-8. Write assoc., comm., or dist., to
correctly label the property of each.
1) 14 (2 – 6) = (14 x 2) – (14 x 6)
2) 3x + 17 = 17 + 3x
3) 12(4 + 8) = (12 x 4) + (12 x 8)
4) (6 x 5) x 9 = 6 x (5 x 9)
5) 3 + (20 + 4) = (3 + 20) + 4
6) (11 – 4) + 12 = 12 + (11 – 4)
7) 10(22 + 12) = (10 x 22) + (10 x 12)
8) 2x + (3x + 3x) = (2x + 3x) + 3x
Answers
The Answers
1) dist. (Distributive Property)
2) comm. (Commutative Property)
3) dist. (Distributive Property)
4) assoc. (Associative Property)
5) assoc. (Associative Property)
6) comm. (Commutative Property)
7) dist. (Distributive Property)
8) assoc. (Associative Property)