Dosage Calculations Made Easy
Solving Problems Using
Dimensional Analysis
8th Edition
• Author(s)Gloria Pearl Craig
TEST BANK
1) Arabic Numbers and Roman Numerals
Reference: Ch. 1 — Arabic Numbers and Roman Numerals
A nurse is preparing potassium iodide tablets for a patient with
a thyroid disorder. The provider orders 2 tablets, and the label
reads gr v per tablet. How many grains will the patient receive
in total?
A. 8 gr
B. 10 gr
,C. 12 gr
D. 15 gr
Correct Answer: B. 10 gr
Rationale — Correct Answer:
The Roman numeral v = 5 grains per tablet. Multiply 5 gr/tablet
× 2 tablets = 10 gr. The tablet unit cancels, leaving grains.
Rationale — Incorrect Options:
A. 8 gr reflects an undercount, likely from misreading the label
or subtracting instead of multiplying.
C. 12 gr is a plausible calculation error from adding an extra
amount.
D. 15 gr reflects multiplying by 3 tablets instead of 2.
Teaching Point: Roman numerals must be converted correctly
before dose calculation.
Citation: Craig, G. P. Dosage Calculations Made Easy: Solving
Problems Using Dimensional Analysis (8th ed.). Ch. 1.
2) Arabic Numbers and Roman Numerals
Reference: Ch. 1 — Arabic Numbers and Roman Numerals
A provider orders x mg of a medication to be given in 2 equal
doses. The pharmacy supplies 2.5 mg tablets. How many
tablets should the nurse give per dose?
A. 1 tablet
B. 2 tablets
,C. 3 tablets
D. 4 tablets
Correct Answer: B. 2 tablets
Rationale — Correct Answer:
The Roman numeral x = 10 mg total. Divide 10 mg ÷ 2 = 5 mg
per dose. Then 5 mg ÷ 2.5 mg/tablet = 2 tablets.
Rationale — Incorrect Options:
A. 1 tablet gives only 2.5 mg, which is half the needed dose.
C. 3 tablets gives 7.5 mg, which exceeds the prescribed amount
per dose.
D. 4 tablets gives the full 10 mg at one time, not half.
Teaching Point: Convert Roman numerals first, then divide and
match units.
Citation: Craig, G. P. Dosage Calculations Made Easy with
Dimensional Analysis (8th ed.). Ch. 1.
3) Multiplying Fractions
Reference: Ch. 1 — Fractions — Multiplying Fractions
A nurse administers 1/2 tablet of a scored medication 3 times
per day. How many tablets will the patient receive in 1 day?
A. 1 tablet
B. 1.5 tablets
C. 2 tablets
D. 3 tablets
, Correct Answer: B. 1.5 tablets
Rationale — Correct Answer:
Multiply 1/2 × 3 = 3/2, which equals 1.5 tablets. The calculation
reflects the total daily amount.
Rationale — Incorrect Options:
A. 1 tablet is too low and reflects adding incorrectly or rounding
down too far.
C. 2 tablets is an overestimate and may result from rounding
1.5 up without instruction.
D. 3 tablets would mean the patient received a full tablet each
dose.
Teaching Point: Multiply the fraction by the number of doses to
find the total daily amount.
Citation: Craig, G. P. Dosage Calculations Made Easy with
Dimensional Analysis (8th ed.). Ch. 1.
4) Dividing Fractions
Reference: Ch. 1 — Fractions — Dividing Fractions
A provider orders 3/4 mL of an oral medication to be given
equally in 3 doses. How much should the nurse administer per
dose?
A. 0.25 mL
B. 0.50 mL
Solving Problems Using
Dimensional Analysis
8th Edition
• Author(s)Gloria Pearl Craig
TEST BANK
1) Arabic Numbers and Roman Numerals
Reference: Ch. 1 — Arabic Numbers and Roman Numerals
A nurse is preparing potassium iodide tablets for a patient with
a thyroid disorder. The provider orders 2 tablets, and the label
reads gr v per tablet. How many grains will the patient receive
in total?
A. 8 gr
B. 10 gr
,C. 12 gr
D. 15 gr
Correct Answer: B. 10 gr
Rationale — Correct Answer:
The Roman numeral v = 5 grains per tablet. Multiply 5 gr/tablet
× 2 tablets = 10 gr. The tablet unit cancels, leaving grains.
Rationale — Incorrect Options:
A. 8 gr reflects an undercount, likely from misreading the label
or subtracting instead of multiplying.
C. 12 gr is a plausible calculation error from adding an extra
amount.
D. 15 gr reflects multiplying by 3 tablets instead of 2.
Teaching Point: Roman numerals must be converted correctly
before dose calculation.
Citation: Craig, G. P. Dosage Calculations Made Easy: Solving
Problems Using Dimensional Analysis (8th ed.). Ch. 1.
2) Arabic Numbers and Roman Numerals
Reference: Ch. 1 — Arabic Numbers and Roman Numerals
A provider orders x mg of a medication to be given in 2 equal
doses. The pharmacy supplies 2.5 mg tablets. How many
tablets should the nurse give per dose?
A. 1 tablet
B. 2 tablets
,C. 3 tablets
D. 4 tablets
Correct Answer: B. 2 tablets
Rationale — Correct Answer:
The Roman numeral x = 10 mg total. Divide 10 mg ÷ 2 = 5 mg
per dose. Then 5 mg ÷ 2.5 mg/tablet = 2 tablets.
Rationale — Incorrect Options:
A. 1 tablet gives only 2.5 mg, which is half the needed dose.
C. 3 tablets gives 7.5 mg, which exceeds the prescribed amount
per dose.
D. 4 tablets gives the full 10 mg at one time, not half.
Teaching Point: Convert Roman numerals first, then divide and
match units.
Citation: Craig, G. P. Dosage Calculations Made Easy with
Dimensional Analysis (8th ed.). Ch. 1.
3) Multiplying Fractions
Reference: Ch. 1 — Fractions — Multiplying Fractions
A nurse administers 1/2 tablet of a scored medication 3 times
per day. How many tablets will the patient receive in 1 day?
A. 1 tablet
B. 1.5 tablets
C. 2 tablets
D. 3 tablets
, Correct Answer: B. 1.5 tablets
Rationale — Correct Answer:
Multiply 1/2 × 3 = 3/2, which equals 1.5 tablets. The calculation
reflects the total daily amount.
Rationale — Incorrect Options:
A. 1 tablet is too low and reflects adding incorrectly or rounding
down too far.
C. 2 tablets is an overestimate and may result from rounding
1.5 up without instruction.
D. 3 tablets would mean the patient received a full tablet each
dose.
Teaching Point: Multiply the fraction by the number of doses to
find the total daily amount.
Citation: Craig, G. P. Dosage Calculations Made Easy with
Dimensional Analysis (8th ed.). Ch. 1.
4) Dividing Fractions
Reference: Ch. 1 — Fractions — Dividing Fractions
A provider orders 3/4 mL of an oral medication to be given
equally in 3 doses. How much should the nurse administer per
dose?
A. 0.25 mL
B. 0.50 mL
