1. Subtracting Real Numbers
ALGEBRA 1 LESSON 1-5
9. –4
10. 11
11. –10
12. –4
13. –2.1
14. –9.2
17. –
18. –1
19.
20. –
21. 3
22. 8
23. 6
24. 2
25. 13
26. 2
27. 6
28. 3
29. –10
30. 7 19 60
31. 1
32. 1
33. 3
34. 0
35. –7
36. –13
37. $50.64
38. –9.5
39. –1.5
40. –2
pages 34–36  Exercises
1. –1  
2. –2  
3. –6  
4. –5  
5. 1  
6. –11  
7. 14  
8. 3   1 6 1 10 11 12
1-5

2. Subtracting Real Numbers
ALGEBRA 1 LESSON 1-5
43. –1
44. 16
45. –16
46. 11
47. 1
48. –2 ft
51. Answers may vary. Sample:
52. false; –1 – (–7) = 6, –1 + (–7) = –8
53. false; 2 – (–1) = 3, 3 < 2 or –1
54. true
55. a : 1997: b.
c. Answers may vary. Sample: Invest in soccer;
it is the only sport that has not lost any participants.
1.3 –0.3 0
–0.4 –1.4 –2.2
0.2 –0.3 –2.2
5 12
–3 7
4 6
5 10
1 6
–8 –3 – =
1-5

3. Subtracting Real Numbers
ALGEBRA 1 LESSON 1-5
56.
57. [–   0   –3]
58.
59. a. Yes, answers may vary. Sample:
n and –n always have the same
absolute value.
b. No, answers may vary. Sample:
|1| + | –1| | 1 + (–1)|,
60. –
61.
62. –4x + 9
63. –12t – m
64.
65.
66. |x| – |y|, |x – y|
and x – y, |x + y|
67. C
68. F
69. C
70. H
71. D
72. 4
73. –9
74. –0.7
75. –4.1
76.
77.
78.
2 –2
–9 3 1 4
29r – 35 16
–15w – 8 9 5 12
1 –
– 1
4 0
0 16
1.2
–2.5
5.2 –3
6 –4 1 2 3 = / = / 9 20 37 60
1-5

4. Subtracting Real Numbers
ALGEBRA 1 LESSON 1-5
79–81. Choices of variables may vary.
79. t = total cost,
p = pounds of pears,
t = 1.19p
80. p = bouquet’s price,
m = money left,
m = 20 – p
81. c = check ($),
s = your share, s = c 6
1-5