Dosage Calculations Made Easy
Solving Problems Using
Dimensional Analysis
8th Edition
• Author(s)Gloria Pearl Craig
TEST BANK
Reference: Ch. 1 — Arabic Numbers and Roman Numerals
Stem: During medication reconciliation, the nurse sees an old
handwritten order for ferrous sulfate VII mg. The electronic
health record requires Arabic numerals before the dose can be
verified. What dose should the nurse enter?
Options:
A. 5 mg
B. 7 mg
,C. 9 mg
D. 12 mg
Correct Answer: B. 7 mg
Rationale — Correct: Roman numeral VII = 7. No calculation is
needed beyond converting the numeral correctly so the
ordered dose is documented in Arabic numerals.
Rationale — A: 5 mg is V, a common mix-up when reading
Roman numerals.
Rationale — C: 9 mg is IX, which uses subtraction and is not the
value shown.
Rationale — D: 12 mg is XII, a larger numeral than the one
ordered.
Teaching Point: Convert Roman numerals before transcribing
medication doses.
Citation: Craig, G. P. (2025). Dosage Calculations Made Easy:
Solving Problems Using Dimensional Analysis (8th ed.). Ch. 1.
Reference: Ch. 1 — Arabic Numbers and Roman Numerals
Stem: A legacy medication record lists a one-time dose of
vitamin K as XII mg. The nurse is converting the dose to Arabic
numerals for the current chart. What dose should be entered?
Options:
A. 10 mg
B. 11 mg
C. 12 mg
D. 15 mg
Correct Answer: C. 12 mg
Rationale — Correct: XII = 12. This is a straightforward numeral
,conversion, and the Arabic value should be entered exactly as
written.
Rationale — A: 10 mg is X, which leaves off two units.
Rationale — B: 11 mg is XI, a common near-miss.
Rationale — D: 15 mg is XV, which is not the value shown.
Teaching Point: Read Roman numerals carefully; one symbol
changes the dose.
Citation: Craig, G. P. (2025). Dosage Calculations Made Easy:
Solving Problems Using Dimensional Analysis (8th ed.). Ch. 1.
Reference: Ch. 1 — Fractions — Multiplying Fractions
Stem: The provider orders 3/2 tablet of an analgesic twice daily
for 14 days. The nurse is calculating the total number of tablets
needed for the full course. How many tablets are required?
Options:
A. 21 tablets
B. 28 tablets
C. 42 tablets
D. 56 tablets
Correct Answer: C. 42 tablets
Rationale — Correct: Set up the calculation as 3/2 tablet/dose
× 2 doses/day × 14 days. The units cancel to tablets, and the
result is 42 tablets.
Rationale — A: 21 tablets reflects dropping one factor of 2.
Rationale — B: 28 tablets comes from using only the daily
doses and days, not the dose amount.
Rationale — D: 56 tablets is a doubling error from multiplying
incorrectly.
, Teaching Point: Multiply all ordered factors; keep the tablet
units through the calculation.
Citation: Craig, G. P. (2025). Dosage Calculations Made Easy:
Solving Problems Using Dimensional Analysis (8th ed.). Ch. 1.
Reference: Ch. 1 — Fractions — Multiplying Fractions
Stem: A child is prescribed 3/4 tablet of a medication three
times a day for 8 days. The nurse needs the total tablets to
dispense. How many tablets are needed?
Options:
A. 9 tablets
B. 18 tablets
C. 24 tablets
D. 27 tablets
Correct Answer: B. 18 tablets
Rationale — Correct: Use 3/4 tablet/dose × 3 doses/day × 8
days. The dose factors multiply to 18 tablets.
Rationale — A: 9 tablets reflects multiplying only the dose and
days, not the number of daily doses.
Rationale — C: 24 tablets comes from treating 3/4 as 1 tablet.
Rationale — D: 27 tablets is a common arithmetic overcount.
Teaching Point: In fraction problems, multiply every factor in
the order.
Citation: Craig, G. P. (2025). Dosage Calculations Made Easy:
Solving Problems Using Dimensional Analysis (8th ed.). Ch. 1.
Reference: Ch. 1 — Fractions — Multiplying Fractions
Stem: The provider orders 1/3 tablet of a sedative twice daily
Solving Problems Using
Dimensional Analysis
8th Edition
• Author(s)Gloria Pearl Craig
TEST BANK
Reference: Ch. 1 — Arabic Numbers and Roman Numerals
Stem: During medication reconciliation, the nurse sees an old
handwritten order for ferrous sulfate VII mg. The electronic
health record requires Arabic numerals before the dose can be
verified. What dose should the nurse enter?
Options:
A. 5 mg
B. 7 mg
,C. 9 mg
D. 12 mg
Correct Answer: B. 7 mg
Rationale — Correct: Roman numeral VII = 7. No calculation is
needed beyond converting the numeral correctly so the
ordered dose is documented in Arabic numerals.
Rationale — A: 5 mg is V, a common mix-up when reading
Roman numerals.
Rationale — C: 9 mg is IX, which uses subtraction and is not the
value shown.
Rationale — D: 12 mg is XII, a larger numeral than the one
ordered.
Teaching Point: Convert Roman numerals before transcribing
medication doses.
Citation: Craig, G. P. (2025). Dosage Calculations Made Easy:
Solving Problems Using Dimensional Analysis (8th ed.). Ch. 1.
Reference: Ch. 1 — Arabic Numbers and Roman Numerals
Stem: A legacy medication record lists a one-time dose of
vitamin K as XII mg. The nurse is converting the dose to Arabic
numerals for the current chart. What dose should be entered?
Options:
A. 10 mg
B. 11 mg
C. 12 mg
D. 15 mg
Correct Answer: C. 12 mg
Rationale — Correct: XII = 12. This is a straightforward numeral
,conversion, and the Arabic value should be entered exactly as
written.
Rationale — A: 10 mg is X, which leaves off two units.
Rationale — B: 11 mg is XI, a common near-miss.
Rationale — D: 15 mg is XV, which is not the value shown.
Teaching Point: Read Roman numerals carefully; one symbol
changes the dose.
Citation: Craig, G. P. (2025). Dosage Calculations Made Easy:
Solving Problems Using Dimensional Analysis (8th ed.). Ch. 1.
Reference: Ch. 1 — Fractions — Multiplying Fractions
Stem: The provider orders 3/2 tablet of an analgesic twice daily
for 14 days. The nurse is calculating the total number of tablets
needed for the full course. How many tablets are required?
Options:
A. 21 tablets
B. 28 tablets
C. 42 tablets
D. 56 tablets
Correct Answer: C. 42 tablets
Rationale — Correct: Set up the calculation as 3/2 tablet/dose
× 2 doses/day × 14 days. The units cancel to tablets, and the
result is 42 tablets.
Rationale — A: 21 tablets reflects dropping one factor of 2.
Rationale — B: 28 tablets comes from using only the daily
doses and days, not the dose amount.
Rationale — D: 56 tablets is a doubling error from multiplying
incorrectly.
, Teaching Point: Multiply all ordered factors; keep the tablet
units through the calculation.
Citation: Craig, G. P. (2025). Dosage Calculations Made Easy:
Solving Problems Using Dimensional Analysis (8th ed.). Ch. 1.
Reference: Ch. 1 — Fractions — Multiplying Fractions
Stem: A child is prescribed 3/4 tablet of a medication three
times a day for 8 days. The nurse needs the total tablets to
dispense. How many tablets are needed?
Options:
A. 9 tablets
B. 18 tablets
C. 24 tablets
D. 27 tablets
Correct Answer: B. 18 tablets
Rationale — Correct: Use 3/4 tablet/dose × 3 doses/day × 8
days. The dose factors multiply to 18 tablets.
Rationale — A: 9 tablets reflects multiplying only the dose and
days, not the number of daily doses.
Rationale — C: 24 tablets comes from treating 3/4 as 1 tablet.
Rationale — D: 27 tablets is a common arithmetic overcount.
Teaching Point: In fraction problems, multiply every factor in
the order.
Citation: Craig, G. P. (2025). Dosage Calculations Made Easy:
Solving Problems Using Dimensional Analysis (8th ed.). Ch. 1.
Reference: Ch. 1 — Fractions — Multiplying Fractions
Stem: The provider orders 1/3 tablet of a sedative twice daily
