Chapter 60 - Review of Mathematics

Question 1

The denominator is always 100 when converting a percentage to a _______.

Answer 1

Fraction.

Question 2

A pill splitter can be used to divide tablets that are _______.

Answer 2

Scored.

Question 3

The dilation of the cervix during childbirth is always measured in _________.

Answer 3

Centimeters.

Question 4

The apothecary system of measurement is based on the average weight of one _______ of wheat.

Answer 4

Grain.

Question 5

A milliliter is approximately equal to a cubic __________.

Answer 5

Centimeter.

Question 6

Grain is the unit of measurement for:

Answer 6

Apothecary System.

Question 7

Pint is the unit of measurement for:

Answer 7

Household System.

Question 8

Microgram is a unit of measurement for:

Answer 8

Metric System.

Question 9

List the correct steps for calculating the number of tablets to be administered:

Answer 9

1. Convert the dosages into the same units of measurement.
2. Set up a true proportion using a double colon.
3. Multiply the known means to get the product.
4. Divide the product by the known extreme.

Question 10

A client has been prescribed Lipitor 20 mg PO once daily. The medication is available as 10 mg/tablet. How many tablets should the nurse administer with each dose?

Answer 10

2 tablets.

Question 11

What step should the nurse follow in converting larger units to smaller units in the metric system of measurement?

Answer 11

Move the decimal point to the right.

Question 12

A nurse calculates a drug dosage using the formula method. Which criteria would the nurse use?

Answer 12

The dosages should be in the same system and the same units of measurement.

Question 13

A nurse is calculating the number of tablets to be administered using the ratio and proportion method. How can the nurse avoid errors in dosage calculations?

Answer 13

All the calculations should be double-checked by another nurse.

Question 14

A client is prescribed 0.25 g of Penicillin VK oral suspension 3 times a day for 10 days. The suspension is available as 125 mg/5 mL. How much medication will the nurse administer with each dose?

Answer 14

10 mL.

Question 15

A client with pulmonary tuberculosis had a positive PPD test and a positive chest radiograph. Which unit of measurement should the nurse use to measure reactions to PPD tests?

Answer 15

Millimeters.

Question 16

A client is prescribed 3/4 mg of Klonopin for anxiety and depression, and the medication supplied is 1/2 mg tablets. How many tablets would the nurse give with each dose?

Answer 16

1 1/2 tablets.

Question 17

What are the common Greek and Latin prefixes used by the nurse to describe various increments of metric units?

Answer 17

Deca; Milli; Hecto.

Question 18

List the correct order for multiplying fractions to calculate drug dosage:

Answer 18

1. Write the given problem.
2. Multiply the numerators.
3. Multiply the denominators.
4. Reduce the fraction to its lowest terms.

Question 19

Which of the following measurements will the nurse take in centimeters?

Answer 19

Height of newborns.
Surgical Incisions.
Skin ulcerations.

Question 20

A label on a cephalexin (Keflex) bottle states: “cephalexin (Keflex) 250mg capsules.” The healthcare provider’s order reads “administer 500mg.” How many capsules would be given?