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Name _______________________________________ Date __________________ Class __________________
LESSON
1-2
Practice A
Properties of Real Numbers
Find the additive inverse of each number.
1. 5
5  ________  0
2. 6.1
3.
1
2
1
 ________  0
2
6.1  ________  0
Find the multiplicative inverse of each number.
4. 11
11  ________  1
5. 3.5
6.
3.5  ________  1
2
3
2
3
 ________  1
Complete each number sentence. Make each statement true.
7. 5(7  2)  5(7)  5(________)
8. (4  6)  3  ________ (6  3)
Identify the property demonstrated by each equation.
9. 7x  x  7
10. c(3  5)  3c  5c
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11. (4  y)  1  4  (y  1)
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12. 0  y  (y)
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Use the table for Exercises 11–14. Use properties and mental math to
help you find each cost.
The Outfit Outlet
13. cost of a T-shirt and a hat __________________
Jeans
$23.50
14. cost of 2 T-shirts and a pair of jeans __________________
T-shirt
$9.95
15. cost of a pair of jeans at a 20% discount __________________
Hat
$6.75
16. total cost of one of each item __________________
Determine if each statement is sometimes, always, or never true.
Give an example or property to support your answer.
17. a  b  c  3c
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18. 4x  6  6x  4
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19. z  (z)  5
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Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor.
1-11
Holt Algebra 2
Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor.
A2
Holt Algebra 2