Download presentation

Presentation is loading. Please wait.

Published byThalia Birdsell Modified over 6 years ago

1
Lesson 1-6 Commutative and Associative Properties Designed by Skip Tyler, Varina High School

2
Commutative Property Commutative means that the order does not make any difference. a + b = b + aa b = b a Examples 4 + 5 = 5 + 4 2 3 = 3 2 The commutative property does not work for subtraction or division.

3
Associative Property Associative means that the grouping does not make any difference. (a + b) + c = a + (b + c) (ab) c = a (bc) Examples (1 + 2) + 3 = 1 + (2 + 3) (2 3) 4 = 2 (3 4) The associative property does not work for subtraction or division.

4
Name the property 1) 5a + (6 + 2a) = 5a + (2a + 6) commutative (switching order) 2) 5a + (2a + 6) = (5a + 2a) + 6 associative (switching groups) 3) 2(3 + a) = 6 + 2a distributive

5
Which property would justify the following statement? 8x + 4 = 4 + 8x 1.Associative property of addition 2.Distributive property 3.Addition property of zero 4.Commutative property of addition

6
Which property would justify the following statement? 8 + (2 + 6) = (8 + 2) + 6 1.Associative property of addition 2.Distributive property 3.Addition property of zero 4.Commutative property of addition

7
Evaluate: 18 + 13 + 16 + 27 + 22 + 24 Rewrite the problem by grouping numbers that can be formed easily. (Associative property) This process may change the order in which the original problem was introduced. (Commutative property) (18 + 22) + (16 + 24) + (13 + 27) (40) + (40) + (40) = 120 Commutative and Associative Properties Commutative and Associative properties are very helpful to solve problems using mental math strategies.

8
Evaluate: 4 7 25 Rewrite the problem by changing the order in which the original problem was introduced. (Commutative property) Group numbers that can be formed easily. (Associative property) 4 25 7 (4 25) 7 (100) 7 = 700 Commutative and Associative Properties Commutative and Associative properties are very helpful to solve problems using mental math strategies.

9
Let’s Practice Together! P34 # 4-13 all

Similar presentations

© 2021 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google