HENKE'S MED-MATH
DOSAGE CALCULATION, PREPARATION
& ADMINISTRATION
10TH EDITION
• AUTHOR(S)SUSAN BUCHHOLZ
TEST BANK
1⃣
Reference
Ch. 1 — Multiplying Whole Numbers
Stem
A provider orders 8 tablets of acetaminophen for a patient to
take over 4 days. Each tablet contains 325 mg. How many
milligrams of acetaminophen will the patient receive in total?
(Show total dose for all tablets.)
Options
A. 2,600 mg
B. 2,080 mg
,C. 1,300 mg
D. 3,250 mg
Correct Answer
A. 2,600 mg
Rationale — Correct (A)
Calculate total mg = number of tablets × mg per tablet = 8 × 325
mg. Multiply: 8 × 300 = 2400; 8 × 25 = 200; 2400 + 200 = 2600
mg. This straightforward whole-number multiplication yields
the total dose.
Rationale — Incorrect
B (2,080 mg): Likely result of multiplying 8 × 260 (misreading
325 as 260); arithmetic/transcription error.
C (1,300 mg): Possibly halved total (8 × 162.5) or thinking only 4
tablets given; underdosing error.
D (3,250 mg): Could be 10 × 325 or 3250 (extra zero); reflects
multiplication or place-value mistake.
Teaching Point
Multiply whole numbers exactly; check place-value when
combining partial products.
Citation
Buchholz, S. (2024). Henke’s Med-Math: Dosage Calculation,
Preparation & Administration (10th ed.). Ch. 1.
2️⃣
,Reference
Ch. 1 — Dividing Whole Numbers
Stem
A nurse must divide 5,000 mL of IV solution evenly into 25
infusion bags for a clinic. How many milliliters should go into
each bag?
Options
A. 200 mL
B. 250 mL
C. 125 mL
D. 2,000 mL
Correct Answer
A. 200 mL
Rationale — Correct (A)
Divide total volume by number of bags: 5,000 mL ÷ 25 = (5000 ÷
25). 25 × 200 = 5000; therefore each bag receives 200 mL.
Rationale — Incorrect
B (250 mL): Result of 5,000 ÷ 20; wrong divisor used.
C (125 mL): Represents 5,000 ÷ 40; incorrect divisor or decimal
misplacement.
D (2,000 mL): 5,000 ÷ 2.5 or misinterpreting units; gross overfill
risk.
Teaching Point
Divide evenly; verify divisor and perform exact integer division
when possible.
, Citation
Buchholz, S. (2024). Henke’s Med-Math: Dosage Calculation,
Preparation & Administration (10th ed.). Ch. 1.
3️⃣
Reference
Ch. 1 — Fractions
Stem
A provider orders 3/4 teaspoon of a pediatric oral medication
per dose. The medication bottle has a calibrated dosing spoon
marked in teaspoons. How many teaspoons is 3/4 teaspoon
expressed as a decimal?
Options
A. 0.75 tsp
B. 0.50 tsp
C. 0.25 tsp
D. 1.25 tsp
Correct Answer
A. 0.75 tsp
Rationale — Correct (A)
Convert fraction to decimal: 3 ÷ 4 = 0.75. Therefore, 3/4
teaspoon = 0.75 teaspoon.
Rationale — Incorrect
B (0.50 tsp): That equals 1/2 tsp — underdose.
DOSAGE CALCULATION, PREPARATION
& ADMINISTRATION
10TH EDITION
• AUTHOR(S)SUSAN BUCHHOLZ
TEST BANK
1⃣
Reference
Ch. 1 — Multiplying Whole Numbers
Stem
A provider orders 8 tablets of acetaminophen for a patient to
take over 4 days. Each tablet contains 325 mg. How many
milligrams of acetaminophen will the patient receive in total?
(Show total dose for all tablets.)
Options
A. 2,600 mg
B. 2,080 mg
,C. 1,300 mg
D. 3,250 mg
Correct Answer
A. 2,600 mg
Rationale — Correct (A)
Calculate total mg = number of tablets × mg per tablet = 8 × 325
mg. Multiply: 8 × 300 = 2400; 8 × 25 = 200; 2400 + 200 = 2600
mg. This straightforward whole-number multiplication yields
the total dose.
Rationale — Incorrect
B (2,080 mg): Likely result of multiplying 8 × 260 (misreading
325 as 260); arithmetic/transcription error.
C (1,300 mg): Possibly halved total (8 × 162.5) or thinking only 4
tablets given; underdosing error.
D (3,250 mg): Could be 10 × 325 or 3250 (extra zero); reflects
multiplication or place-value mistake.
Teaching Point
Multiply whole numbers exactly; check place-value when
combining partial products.
Citation
Buchholz, S. (2024). Henke’s Med-Math: Dosage Calculation,
Preparation & Administration (10th ed.). Ch. 1.
2️⃣
,Reference
Ch. 1 — Dividing Whole Numbers
Stem
A nurse must divide 5,000 mL of IV solution evenly into 25
infusion bags for a clinic. How many milliliters should go into
each bag?
Options
A. 200 mL
B. 250 mL
C. 125 mL
D. 2,000 mL
Correct Answer
A. 200 mL
Rationale — Correct (A)
Divide total volume by number of bags: 5,000 mL ÷ 25 = (5000 ÷
25). 25 × 200 = 5000; therefore each bag receives 200 mL.
Rationale — Incorrect
B (250 mL): Result of 5,000 ÷ 20; wrong divisor used.
C (125 mL): Represents 5,000 ÷ 40; incorrect divisor or decimal
misplacement.
D (2,000 mL): 5,000 ÷ 2.5 or misinterpreting units; gross overfill
risk.
Teaching Point
Divide evenly; verify divisor and perform exact integer division
when possible.
, Citation
Buchholz, S. (2024). Henke’s Med-Math: Dosage Calculation,
Preparation & Administration (10th ed.). Ch. 1.
3️⃣
Reference
Ch. 1 — Fractions
Stem
A provider orders 3/4 teaspoon of a pediatric oral medication
per dose. The medication bottle has a calibrated dosing spoon
marked in teaspoons. How many teaspoons is 3/4 teaspoon
expressed as a decimal?
Options
A. 0.75 tsp
B. 0.50 tsp
C. 0.25 tsp
D. 1.25 tsp
Correct Answer
A. 0.75 tsp
Rationale — Correct (A)
Convert fraction to decimal: 3 ÷ 4 = 0.75. Therefore, 3/4
teaspoon = 0.75 teaspoon.
Rationale — Incorrect
B (0.50 tsp): That equals 1/2 tsp — underdose.
