Chapter 21 Mathematics Review and Medication Administration

Chapter 21  Mathematics Review and Medication Administration

Complete Chapter Questions And Answers
 

Sample Questions

MULTIPLE CHOICE

8. What is 2.34 + 0.77?
a.
0.01
b.
90.4
c.
2.417
d.
3.11

ANS: D
Align the decimal point of each decimal fraction in a column and add.

DIF: Cognitive Level: Comprehension REF: Page 685 OBJ: 1
TOP: Math KEY: Nursing Process Step: N/A MSC: NCLEX: N/A

9. What is 6.147 rounded to the nearest tenth?
a.
6.2
b.
6.15
c.
6.14
d.
6.1

ANS: D
A subsequent number that is 5 or larger can increase the previous number by one whole number. A subsequent number that is less than 5 will leave the number unchanged.

DIF: Cognitive Level: Application REF: Page 686 OBJ: 1
TOP: Math KEY: Nursing Process Step: N/A MSC: NCLEX: N/A

10. What is 2.5 × 2?
a.
1.25
b.
5
c.
50
d.
22.5

ANS: B
When multiplying, decimal points do not have to be aligned. The decimal point in the answer is determined by the number of decimal points found to the right of the decimal point in the numbers multiplied.

DIF: Cognitive Level: Application REF: Page 686 OBJ: 1
TOP: Math KEY: Nursing Process Step: N/A MSC: NCLEX: N/A

11. What is 4.5 divided by 3?
a.
0.75
b.
1.5
c.
5
d.
0.66

ANS: B
In the divisor, move the decimal point all the way to the right and move the decimal point in the dividend the same number of places as moved in the divisor.

DIF: Cognitive Level: Application REF: Page 686 OBJ: 1
TOP: Math KEY: Nursing Process Step: N/A MSC: NCLEX: N/A

12. What is 0.9% expressed as a decimal?
a.
9
b.
0.9
c.
0.09
d.
0.009

ANS: D
Remove the % and move the decimal point two places to the left.

DIF: Cognitive Level: Application REF: Page 687 OBJ: 1
TOP: Math KEY: Nursing Process Step: N/A MSC: NCLEX: N/A