HENKE'S MED-MATH
DOSAGE CALCULATION, PREPARATION
& ADMINISTRATION
10TH EDITION
• AUTHOR(S)SUSAN BUCHHOLZ
TEST BANK
1)
Reference
Ch. 1 — Multiplying Whole Numbers
Stem
A physician orders 3 tablets of acetaminophen 325 mg for a
patient. The medication drawer contains tablets labeled 325 mg
each. How many milligrams will the nurse administer in total?
Show the total dose to be given.
Options
A. 975 mg
,B. 650 mg
C. 1,300 mg
D. 325 mg
Correct Answer
A. 975 mg
Rationales
Correct (A): Multiply whole numbers: 3 tablets × 325 mg/tablet
= 975 mg. This is the total amount the patient will receive.
B (650 mg): Error: multiplied 2 × 325 instead of 3 × 325 —
underdosing risk.
C (1,300 mg): Error: added an extra 325 (4 × 325) — would
overdose.
D (325 mg): Error: gave the dose for one tablet only, not three
tablets.
Teaching Point
Multiply tablets × strength per tablet; check units (tablets ×
mg/tablet = mg).
Citation
Buchholz, S. (2024). Henke’s Med-Math: Dosage Calculation,
Preparation & Administration (10th ed.). Ch. 1.
2)
Reference
Ch. 1 — Dividing Whole Numbers
,Stem
An IV bag contains 1,000 mL of normal saline to be infused
equally over 8 hours. What is the infusion rate in mL per hour?
Provide the exact value.
Options
A. 125 mL/hr
B. 80 mL/hr
C. 200 mL/hr
D. 100 mL/hr
Correct Answer
A. 125 mL/hr
Rationales
Correct (A): Divide whole numbers: 1,000 mL ÷ 8 hr = 125
mL/hr.
B (80 mL/hr): Error: 1,000 ÷ 12.5 (confused hours) or decimal
shift — under-infusion.
C (200 mL/hr): Error: 1,000 ÷ 5 — too fast (risk fluid overload).
D (100 mL/hr): Error: 1,000 ÷ 10 — wrong divisor.
Teaching Point
Total volume ÷ total time = infusion rate (mL/hr).
Citation
Buchholz, S. (2024). Henke’s Med-Math (10th ed.). Ch. 1.
3)
, Reference
Ch. 1 — Fractions
Stem
A suspension bottle contains 5/8 teaspoon (tsp) of medication
per dose. The order is for 3 doses. How many teaspoons will the
patient receive in total? Provide the fraction simplified.
Options
A. 15/8 tsp (1 7/8 tsp)
B. 9/8 tsp (1 1/8 tsp)
C. 5/24 tsp
D. 3/8 tsp
Correct Answer
A. 15/8 tsp (1 7/8 tsp)
Rationales
Correct (A): Multiply fractions: 3 × (5/8) = 15/8 = 1 7/8 tsp.
B (9/8): Error: multiplied numerator or denominator incorrectly
(3×3/8 instead of 3×5/8).
C (5/24): Error: dividing instead of multiplying (5/8 ÷ 3).
D (3/8): Error: took 3 × 1/8 rather than 5/8.
Teaching Point
Multiply numerators and denominators; simplify fractions and
convert to mixed numbers.
Citation
Buchholz, S. (2024). Henke’s Med-Math (10th ed.). Ch. 1.
DOSAGE CALCULATION, PREPARATION
& ADMINISTRATION
10TH EDITION
• AUTHOR(S)SUSAN BUCHHOLZ
TEST BANK
1)
Reference
Ch. 1 — Multiplying Whole Numbers
Stem
A physician orders 3 tablets of acetaminophen 325 mg for a
patient. The medication drawer contains tablets labeled 325 mg
each. How many milligrams will the nurse administer in total?
Show the total dose to be given.
Options
A. 975 mg
,B. 650 mg
C. 1,300 mg
D. 325 mg
Correct Answer
A. 975 mg
Rationales
Correct (A): Multiply whole numbers: 3 tablets × 325 mg/tablet
= 975 mg. This is the total amount the patient will receive.
B (650 mg): Error: multiplied 2 × 325 instead of 3 × 325 —
underdosing risk.
C (1,300 mg): Error: added an extra 325 (4 × 325) — would
overdose.
D (325 mg): Error: gave the dose for one tablet only, not three
tablets.
Teaching Point
Multiply tablets × strength per tablet; check units (tablets ×
mg/tablet = mg).
Citation
Buchholz, S. (2024). Henke’s Med-Math: Dosage Calculation,
Preparation & Administration (10th ed.). Ch. 1.
2)
Reference
Ch. 1 — Dividing Whole Numbers
,Stem
An IV bag contains 1,000 mL of normal saline to be infused
equally over 8 hours. What is the infusion rate in mL per hour?
Provide the exact value.
Options
A. 125 mL/hr
B. 80 mL/hr
C. 200 mL/hr
D. 100 mL/hr
Correct Answer
A. 125 mL/hr
Rationales
Correct (A): Divide whole numbers: 1,000 mL ÷ 8 hr = 125
mL/hr.
B (80 mL/hr): Error: 1,000 ÷ 12.5 (confused hours) or decimal
shift — under-infusion.
C (200 mL/hr): Error: 1,000 ÷ 5 — too fast (risk fluid overload).
D (100 mL/hr): Error: 1,000 ÷ 10 — wrong divisor.
Teaching Point
Total volume ÷ total time = infusion rate (mL/hr).
Citation
Buchholz, S. (2024). Henke’s Med-Math (10th ed.). Ch. 1.
3)
, Reference
Ch. 1 — Fractions
Stem
A suspension bottle contains 5/8 teaspoon (tsp) of medication
per dose. The order is for 3 doses. How many teaspoons will the
patient receive in total? Provide the fraction simplified.
Options
A. 15/8 tsp (1 7/8 tsp)
B. 9/8 tsp (1 1/8 tsp)
C. 5/24 tsp
D. 3/8 tsp
Correct Answer
A. 15/8 tsp (1 7/8 tsp)
Rationales
Correct (A): Multiply fractions: 3 × (5/8) = 15/8 = 1 7/8 tsp.
B (9/8): Error: multiplied numerator or denominator incorrectly
(3×3/8 instead of 3×5/8).
C (5/24): Error: dividing instead of multiplying (5/8 ÷ 3).
D (3/8): Error: took 3 × 1/8 rather than 5/8.
Teaching Point
Multiply numerators and denominators; simplify fractions and
convert to mixed numbers.
Citation
Buchholz, S. (2024). Henke’s Med-Math (10th ed.). Ch. 1.
