1-2 Practice A - mathbjaran

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Holt Algebra 2. All rights reserved. Name. Date. Class. LESSON. 1-2. Practice A. Properties of Real Numbers. Find the additive inverse of each number. 1. 5. 2.

Name LESSON

1-2

Date

Class

Practice A Properties of Real Numbers

Find the additive inverse of each number. 1. 5

1 3. __ 2

2. 6.1

5

5 

0

6.1

6.1 

1 __ 2

1 __

0

2

0

Find the multiplicative inverse of each number. 4. 11

5. 3.5

1 ___ 11

11 ⴢ

1

2 6. ___ 3

2 __ 7

3.5 ⴢ

3 ___

2 ⴢ ___

1

2

3

1

Complete each number sentence. Make each statement true. 7. 5  7  2   5  7   5 



2

8.  4  6  3 

4

 6  3 

Identify the property demonstrated by each equation. 9. 7x  x ⴢ 7

10. c  3  5   3c  5c

Commutative

Distributive 12. 0  y   y 

11.  4  y   1  4   y  1 

Associative

Additive Inverse

Use the table for Exercises 11–14. Use properties and mental math to help you find each cost. 13. cost of a T-shirt and a hat

$16.70

The Outfit Outlet

$43.40

14. cost of 2 T-shirts and a pair of jeans

$18.80

15. cost of a pair of jeans at a 20% discount 16. total cost of one of each item

$40.20

Jeans

$23.50

T-shirt

$9.95

Hat

$6.75

Determine if each statement is sometimes, always, or never true. Give an example or property to support your answer. 17. a  b  c  3c

Sometimes; if a  b  c

18. 4x ⴢ 6  6x ⴢ 4

Always; Associative Property

19. z   z   5

Never; Additive Inverse Property

Copyright © by Holt, Rinehart and Winston. All rights reserved.

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Holt Algebra 2

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