Algebra Demystified 2nd Ed

Chapter 4 NegaTive NuMberS 83

DeMYSTiFieD / algebra DeMYSTiFieD / HuttenMuller / 000-0 / Chapter 4

PRACTICE

Rewrite as an addition problem.

1. 8 – 5 =


2. –29 – 4 =


3. –6 – (–10) =


4. 15 – x =


5. 40 – 85 =


6. y – 37 =


7. –x – (–14) =


8. –x – 9 =


9. −^4 +=
   5

2

3

Remember to convert a mixed number to an improper fraction before sub-

tracting.

10. 2381 −=^14


11. −−= 4129 12
    12.^5
    36

−= 2

13.^6
25

2

3

14

15

+− =

14. −^4 +− =
    3

5

6

8

21

15. 1345 −−=^12176

SOLUTIONS

1. 8 – 5 = 8 + (–5)


2. –29 – 4 = –29 + (–4)


3. –6 – (–10) = –6 + 10


4. 15 – x = 15 + (–x)


5. 40 – 85 = 40 + (–85)


6. y – 37 = y + (–37)

PRACTICE

Rewrite as an addition problem.

SOLUTIONS

1. 8 – 5 = 8 + (–5)