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 — Arithmetic Review — Arabic Numbers and
Roman Numerals
Question Stem:
A legacy medication order reads morphine gr IV for severe pain.
Before transcribing the order, the nurse converts the Roman
,numeral to an Arabic number to verify the dose. How many
grains is the order written for?
Options:
A. 4 grains
B. 6 grains
C. 40 grains
D. 0.4 grain
Correct Answer: A. 4 grains
Rationale — Correct Answer:
IV equals 4 because I placed before V means 5 − 1. The nurse
should recognize this before transcribing to prevent a
medication error.
Rationale — Incorrect Options:
B. VI equals 6, which reverses the numeral order.
C. XL equals 40, not IV.
D. 0.4 is a decimal error, not a Roman numeral conversion.
Teaching Point: Roman numerals must be converted exactly
before transcribing a legacy order.
Citation: Craig, G. P. (2025). Dosage Calculations Made Easy:
Solving Problems Using Dimensional Analysis (8th ed.). Ch. 1.
2) Arabic Numbers and Roman Numerals
Reference: Ch. 1 — Arithmetic Review — Arabic Numbers and
Roman Numerals
,Question Stem:
A medication label is printed with the strength XII mL on a
historical charting system. The nurse converts the value to
Arabic numerals before documenting the amount administered.
What is the correct conversion?
Options:
A. 11 mL
B. 12 mL
C. 14 mL
D. 22 mL
Correct Answer: B. 12 mL
Rationale — Correct Answer:
X = 10 and II = 2, so XII = 12. Correct conversion is essential
when interpreting older documentation or labels.
Rationale — Incorrect Options:
A. XI equals 11, not XII.
C. XIV equals 14, which is a different numeral.
D. XXII equals 22, not XII.
Teaching Point: Read Roman numerals left to right and total the
values correctly.
Citation: Craig, G. P. (2025). Dosage Calculations Made Easy:
Solving Problems Using Dimensional Analysis (8th ed.). Ch. 1.
3) Multiplying Fractions
, Reference: Ch. 1 — Arithmetic Review — Fractions —
Multiplying Fractions
Question Stem:
A patient is prescribed 2/3 tablet of a medication, and the
pharmacist instructs the nurse to verify the equivalent amount
if the dose is repeated across a 3/4-tablet portion. What is 2/3 ×
3/4?
Options:
A. 1/2 tablet
B. 1/4 tablet
C. 3/4 tablet
D. 5/8 tablet
Correct Answer: A. 1/2 tablet
Rationale — Correct Answer:
Multiply numerators and denominators: 2 × 3 = 6 and 3 × 4 =
12, giving 6/12, which simplifies to 1/2. Fraction simplification
prevents dose miscalculation.
Rationale — Incorrect Options:
B. 1/4 is too small and suggests incomplete multiplication or
over-simplification.
C. 3/4 copies one factor instead of multiplying both fractions.
D. 5/8 is not equivalent to 6/12 and reflects an incorrect
product.
Teaching Point: Multiply straight across, then reduce the
fraction.
Solving Problems Using
Dimensional Analysis
8th Edition
• Author(s)Gloria Pearl Craig
TEST BANK
1) Arabic Numbers and Roman Numerals
Reference: Ch. 1 — Arithmetic Review — Arabic Numbers and
Roman Numerals
Question Stem:
A legacy medication order reads morphine gr IV for severe pain.
Before transcribing the order, the nurse converts the Roman
,numeral to an Arabic number to verify the dose. How many
grains is the order written for?
Options:
A. 4 grains
B. 6 grains
C. 40 grains
D. 0.4 grain
Correct Answer: A. 4 grains
Rationale — Correct Answer:
IV equals 4 because I placed before V means 5 − 1. The nurse
should recognize this before transcribing to prevent a
medication error.
Rationale — Incorrect Options:
B. VI equals 6, which reverses the numeral order.
C. XL equals 40, not IV.
D. 0.4 is a decimal error, not a Roman numeral conversion.
Teaching Point: Roman numerals must be converted exactly
before transcribing a legacy order.
Citation: Craig, G. P. (2025). Dosage Calculations Made Easy:
Solving Problems Using Dimensional Analysis (8th ed.). Ch. 1.
2) Arabic Numbers and Roman Numerals
Reference: Ch. 1 — Arithmetic Review — Arabic Numbers and
Roman Numerals
,Question Stem:
A medication label is printed with the strength XII mL on a
historical charting system. The nurse converts the value to
Arabic numerals before documenting the amount administered.
What is the correct conversion?
Options:
A. 11 mL
B. 12 mL
C. 14 mL
D. 22 mL
Correct Answer: B. 12 mL
Rationale — Correct Answer:
X = 10 and II = 2, so XII = 12. Correct conversion is essential
when interpreting older documentation or labels.
Rationale — Incorrect Options:
A. XI equals 11, not XII.
C. XIV equals 14, which is a different numeral.
D. XXII equals 22, not XII.
Teaching Point: Read Roman numerals left to right and total the
values correctly.
Citation: Craig, G. P. (2025). Dosage Calculations Made Easy:
Solving Problems Using Dimensional Analysis (8th ed.). Ch. 1.
3) Multiplying Fractions
, Reference: Ch. 1 — Arithmetic Review — Fractions —
Multiplying Fractions
Question Stem:
A patient is prescribed 2/3 tablet of a medication, and the
pharmacist instructs the nurse to verify the equivalent amount
if the dose is repeated across a 3/4-tablet portion. What is 2/3 ×
3/4?
Options:
A. 1/2 tablet
B. 1/4 tablet
C. 3/4 tablet
D. 5/8 tablet
Correct Answer: A. 1/2 tablet
Rationale — Correct Answer:
Multiply numerators and denominators: 2 × 3 = 6 and 3 × 4 =
12, giving 6/12, which simplifies to 1/2. Fraction simplification
prevents dose miscalculation.
Rationale — Incorrect Options:
B. 1/4 is too small and suggests incomplete multiplication or
over-simplification.
C. 3/4 copies one factor instead of multiplying both fractions.
D. 5/8 is not equivalent to 6/12 and reflects an incorrect
product.
Teaching Point: Multiply straight across, then reduce the
fraction.
