NAME
2-3
DATE
PERIOD
Study Guide and Intervention
Subtracting Integers
Subtracting
Integers
Example 1
To subtract an integer, add its additive inverse.
Find each difference.
a. 9 - 17
9 - 17 = 9 + (-17)
= -8
Example 2
b. -7 - 3
-7 - 3 = -7 + (-3)
= -10
To subtract 17, add -17.
Simplify.
To subtract 3, add -3.
Simplify.
Find each difference.
a. 4 - (-5)
4 - (-5) = 4 + 5
=9
b. -6 - (-2)
-6 - (-2) = -6 + 2
= -4
To subtract -5, add +5.
Simplify.
To subtract -2, add +2.
Simplify.
Exercises
1. 9 - 16
2. 7 - 19
3. 12 - 21
4. -5 - 3
5. -8 - 9
6. -13 - 17
7. 7 - (-4)
8. 9 - (-9)
9. -11 - (-2)
10. -6 - (-9)
11. -6 - 4
12. -16 - (-20)
13. -14 - 4
14. 8 - (-6)
15. -10 - (-6)
16. 13 - (-17)
17. 24 - (-16)
18. 17 - (-9)
19. -24 - 8
20. 18 - (-9)
21. 26 - 49
22. -45 - (-26)
23. -15 - (-25)
24. 29 - (-6)
Chapter 2
17
Glencoe Pre-Algebra
Lesson 2-3
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Find each difference.
NAME
DATE
2-3
PERIOD
Study Guide and Intervention
(continued)
Subtracting Integers
Evaluate Expressions
Example
Use the rule for subtracting integers to evaluate expressions.
Evaluate each expression.
a. x - 16 if x = 6.
x - 16 = 6 - 16
Write the expression. Replace x with 6.
= 6 + (-16)
To subtract 16, add its additive inverse, -16.
= -10
Add 6 and -16.
b. a - b - c if a = 7, b = 2, and c = -3.
a - b - c = 7 - 2 - (-3)
Replace a with 7, b with 2, and c with -3.
= 5 - (-3)
Use order of operations.
=5+3
To subtract -3, add its additive inverse, 3.
=8
Add 5 and 3.
Exercises
ALGEBRA Evaluate each expression if a = 11, b = -1, and c = -8.
2. b - 5
3. 12 – c
4. 33 - a
5. c - 8
6. -19 - b
7. -5 - c
8. 3 - a
9. b - (-1)
10. a - (-7)
11. 6 - b
12. c - (-12)
13. a - b
14. a - c
15. c - b
16. b - c
17. c - a
18. b - a
19. a - b - c
20. a + b - c
21. b - c - a
22. c - a + b
23. b - (-a) - c
24. c + b - a
Chapter 2
18
Glencoe Pre-Algebra
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
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