Test Bank for Drug Calculations 10th Edition by Brown

Chapter 01: General Mathematics
Brown & Mulholland: Drug Calculations: Ratio and Proportion Problems for Clinical Practice


ESSAY

Directions: Solve the following problems.

7 1
1. Add and reduce to lowest terms: +
8 8

ANS:
7 1 8
+ = =1
8 8 8

1 1
2. Add: +
3 8

ANS:
1 1 8 3 11
+ = + =
3 8 24 24 24

2 1
3. Multiply and reduce to lowest terms: ×
3 8

ANS:
2 1 2 1
× = =
3 8 24 12

1 1
4. Multiply and reduce to lowest terms: ×
4 10

ANS:
1 1 1
× =
4 10 40

1 3
5. Divide and reduce to lowest terms: ÷
4 8

ANS:
1 3 1 8 8 2
÷ = × = =
4 8 4 3 12 3

1 1
6. Divide and reduce to lowest terms: ÷
2 6

ANS:
1 1 1 6
÷ = × =3
2 6 2 1

1 1
7. Which is greater, or ?
7 9

ANS:
1
7

1 1
8. Which is smaller, or ?
6 8

ANS:

, 12. Which is greater, 0.25 or 0.05?

ANS:
0.25

13. Round to the nearest tenth: 3.124

ANS:
3.1

14. Round to the nearest hundredth: 0.42877

ANS:
0.43

15. Round to the nearest whole number: 5.742

ANS:
6

16. Round to the nearest ten thousandth: 0.576391

ANS:
0.5764

17. Divide 7.35 by 0.25.

ANS:
29.4

18. Multiply 4.25 by 0.2.

ANS:
0.85

19. Find 5% of 75.

ANS:
0.05 × 75 = 3.75 ÊÁË 10% of 75 is 7.5; 5% would be one half of that ˆ˜¯

20. Find 55% of 120.

ANS:
0.55 × 120 = 66 (a little more than one half of 120)

1
21. Write as a percentage and as a decimal.
10

ANS:
10%, 0.1

22. Write 0.05 as a fraction and as a percentage.

ANS:
5 1
(reduce to ), 5%
100 20

23. Write 85% as a fraction and as a decimal.

ANS:
85 17
(reduce to ), 0.85
100 20