Adding and Subtracting Real Numbers

Name Date Class

Practice A

Adding and Subtracting Real Numbers

Add or subtract using a number line.

1. -2 + (-4) = ______2. 1 - (-5) = ______

3. 3 + (-3) = ______4. -6 - (-3) = ______

Add.

5. -10 + 3 6. -5 + (-13) 7. 6 + (-8)

8. -8.5 + 12.7 9. x + 7 for x = -2 10. -20 + y for y = -9

Subtract.

11. -15 - (-8) 12. 16 - (-6) 13. 4 - 9

14. -2 - 5 15. 10 - n for n = 25 16. p - 3 for p = -8

17. Tommy stands on a diving board that is 4 feet above
the pool’s surface. He dives and touches the bottom
of the pool, which is 12 feet below the pool’s surface.
What is the total length of Tommy’s dive?

18.  On her math quiz, Sandra lost 8 points for incorrect
answers, but she gained 5 points for a bonus question.
What is the sum of the points Sandra lost and gained?

Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor.

1-11 Holt McDougal Algebra 1

Name Date Class

Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor.

1-11 Holt McDougal Algebra 1

4. Possible answer: It depends on the number of minutes used. Plan A is cheaper if you use less than 300 minutes each month. Plan B is cheaper if you use more than 300 minutes each month. If you use exactly 300 minutes each month, the plans cost the same.

Problem Solving

1. 45d 2. 5.15 - w

3. 216 + t

4. ; $22, $11, $10

5. C 6. F

7. B

Reading Strategies

1. Possible answers: 10y, 10 • y, and 10(y)

2. Possible answers: k divided by 6, the quotient of k and 6

3. b - 4 4. 4 - b

5. 20m 6. 58 + t

LESSON 1–2

Practice A

1. -6 2. 6

3. 0 4. -3

5. -7 6. -18

7. -2 8. 4.2

9. 5 10. -29

11. -7 12. 22

13. -5 14. -7

15. -15 16. -11

17. 16 feet 18. -3 points

Practice B

1. -14 2. 10

3. 6 4. 4

5. 0 6. -4.25

7. 18 8. -24

9. -20.9 10. 4

11. 2 12. -12.4

13. 45 14. 28

15. -2.4 16. -6

17. 37 18. -2.5

19. 116°F 20. -$6.26

21. 31 22. 9.45

23. -2

Practice C

1. -4 2. -11

3. 12 4. -42

5. 1.6 6. 2

7. - 8. -0.3

9. -4 10. 22

11. -15.1 12. -3

13. - 14. -3

15. 9.5 16. 7 feet

17. -$24,577 18. 31

19. 1.75 20. 2

Review for Mastery

1. -3

2. 5

3. 4 4. -1

5. -8 6. 6

7. -8 8. 11

9. -2 10. 0

11. -5 12. -4

13. -9.7 14.-

Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor.

A2 Holt McDougal Algebra 1