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
Question:
A provider writes an order for XII mg of a medication. The nurse
must document the dose in Arabic numerals before
administration. Which dose should the nurse identify?
This is a routine medication-order interpretation question and
requires accurate reading of Roman numerals.
,Options:
A. 10 mg
B. 11 mg
C. 12 mg
D. 14 mg
Correct Answer: C. 12 mg
Rationales:
• Correct Answer: Roman numeral XII equals 10 + 2 = 12.
The nurse should document the dose as 12 mg to avoid
transcription error.
• A: 10 mg ignores the two I’s that add 2 more units.
• B: 11 mg reflects a one-unit error, often from misreading
the numeral.
• D: 14 mg is unsafe because it overstates the ordered dose.
Teaching Point: Roman numerals must be translated exactly to
prevent dose transcription errors.
Citation: Craig, G. P. (n.d.). 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
Question:
A medication label shows XIV mL. The nurse is verifying the
,amount before charting it in Arabic numerals. What amount
should be recorded?
Accurate number translation is essential before any medication
is prepared.
Options:
A. 12 mL
B. 13 mL
C. 14 mL
D. 16 mL
Correct Answer: C. 14 mL
Rationales:
• Correct Answer: XIV equals 10 + 4 = 14 because IV means
5 − 1 = 4.
• A: 12 mL incorrectly treats XIV as X plus II.
• B: 13 mL is a near miss and reflects a counting error.
• D: 16 mL adds too much and could cause an unsafe volume
error.
Teaching Point: Roman numerals use subtraction when a
smaller numeral appears before a larger one.
Citation: Craig, G. P. (n.d.). Dosage Calculations Made Easy:
Solving Problems Using Dimensional Analysis (8th ed.). Ch. 1.
3) Multiplying Fractions
, Reference: Ch. 1 — Fractions — Multiplying Fractions
Question:
A patient is prescribed 3/4 tablet of a medication twice daily.
How many tablets will the patient take in 1 day?
The nurse must calculate the total daily amount before
administration.
Options:
A. 1 1/4 tablets
B. 1 1/2 tablets
C. 1 3/4 tablets
D. 2 tablets
Correct Answer: B. 1 1/2 tablets
Rationales:
• Correct Answer: Multiply 3/4 × 2/1 = 6/4 = 1 1/2 tablets.
The units stay as tablets, and the calculation confirms the
daily total.
• A: 1 1/4 tablets reflects undercounting the second dose.
• C: 1 3/4 tablets is too high and suggests an extra quarter
tablet was added.
• D: 2 tablets is the result of rounding up incorrectly.
Teaching Point: Multiply the fraction by the number of doses to
find the total daily amount.
Citation: Craig, G. P. (n.d.). Dosage Calculations Made Easy:
Solving Problems Using Dimensional Analysis (8th ed.). Ch. 1.
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
Question:
A provider writes an order for XII mg of a medication. The nurse
must document the dose in Arabic numerals before
administration. Which dose should the nurse identify?
This is a routine medication-order interpretation question and
requires accurate reading of Roman numerals.
,Options:
A. 10 mg
B. 11 mg
C. 12 mg
D. 14 mg
Correct Answer: C. 12 mg
Rationales:
• Correct Answer: Roman numeral XII equals 10 + 2 = 12.
The nurse should document the dose as 12 mg to avoid
transcription error.
• A: 10 mg ignores the two I’s that add 2 more units.
• B: 11 mg reflects a one-unit error, often from misreading
the numeral.
• D: 14 mg is unsafe because it overstates the ordered dose.
Teaching Point: Roman numerals must be translated exactly to
prevent dose transcription errors.
Citation: Craig, G. P. (n.d.). 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
Question:
A medication label shows XIV mL. The nurse is verifying the
,amount before charting it in Arabic numerals. What amount
should be recorded?
Accurate number translation is essential before any medication
is prepared.
Options:
A. 12 mL
B. 13 mL
C. 14 mL
D. 16 mL
Correct Answer: C. 14 mL
Rationales:
• Correct Answer: XIV equals 10 + 4 = 14 because IV means
5 − 1 = 4.
• A: 12 mL incorrectly treats XIV as X plus II.
• B: 13 mL is a near miss and reflects a counting error.
• D: 16 mL adds too much and could cause an unsafe volume
error.
Teaching Point: Roman numerals use subtraction when a
smaller numeral appears before a larger one.
Citation: Craig, G. P. (n.d.). Dosage Calculations Made Easy:
Solving Problems Using Dimensional Analysis (8th ed.). Ch. 1.
3) Multiplying Fractions
, Reference: Ch. 1 — Fractions — Multiplying Fractions
Question:
A patient is prescribed 3/4 tablet of a medication twice daily.
How many tablets will the patient take in 1 day?
The nurse must calculate the total daily amount before
administration.
Options:
A. 1 1/4 tablets
B. 1 1/2 tablets
C. 1 3/4 tablets
D. 2 tablets
Correct Answer: B. 1 1/2 tablets
Rationales:
• Correct Answer: Multiply 3/4 × 2/1 = 6/4 = 1 1/2 tablets.
The units stay as tablets, and the calculation confirms the
daily total.
• A: 1 1/4 tablets reflects undercounting the second dose.
• C: 1 3/4 tablets is too high and suggests an extra quarter
tablet was added.
• D: 2 tablets is the result of rounding up incorrectly.
Teaching Point: Multiply the fraction by the number of doses to
find the total daily amount.
Citation: Craig, G. P. (n.d.). Dosage Calculations Made Easy:
Solving Problems Using Dimensional Analysis (8th ed.). Ch. 1.
