HENKE'S MED-MATH
DOSAGE CALCULATION, PREPARATION
& ADMINISTRATION
10TH EDITION
• AUTHOR(S)SUSAN BUCHHOLZ
TEST BANK
1.
Reference
Ch. 1 — Multiplying Whole Numbers
Question Stem
A physician prescribes amoxicillin 125 mg tablets: give 3 tablets
per dose, three times daily for 7 days. How many milligrams of
amoxicillin will the patient receive in total for the full 7-day
course? Show safe preparation reasoning.
Options
A. 3,375 mg
B. 7,875 mg
,C. 4,500 mg
D. 6,125 mg
Correct Answer
B. 7,875 mg
Rationales
Correct (B): Per dose = 3 tablets × 125 mg = 375 mg. Daily = 375
mg × 3 doses = 1,125 mg/day. Total 7 days = 1,125 mg/day × 7
days = 7,875 mg. This multiplies whole numbers stepwise and
confirms total supply needed.
A (3,375 mg): Error = used single multiplication 3 × 1,125 or
miscounted days; underestimates total course.
C (4,500 mg): Error = likely calculated 375 mg × 12 doses (12
rather than 21). Leads to dispensing insufficient supply.
D (6,125 mg): Error = arithmetic mistake in multiplying daily or
days; could result in wrong supply planning.
Teaching Point
Multiply dose × doses per day × days to get total amount.
Citation
Buchholz, S. (2024). Henke’s Med-Math: Dosage Calculation,
Preparation & Administration (10th ed.). Ch. 1.
2.
Reference
Ch. 1 — Dividing Whole Numbers
,Question Stem
A pharmacy supplies a 90-tablet bottle of carvedilol with
instructions to take 1 tablet twice daily. For how many days will
this bottle last at that dosing schedule? Calculate and apply safe
refill timing.
Options
A. 15 days
B. 30 days
C. 45 days
D. 60 days
Correct Answer
B. 30 days
Rationales
Correct (B): Daily use = 1 tablet × 2 = 2 tablets/day. Days supply
= 90 tablets ÷ 2 tablets/day = 45 days? Wait—recompute
carefully: 90 ÷ 2 = 45. (Correction: original calculation yields 45
days.) [Correction applied below — correct answer should be
45 days; update follows.]
[Admin note: The previous item contained an arithmetic
inconsistency. The correct computation is 90 ÷ 2 = 45 days. I
will replace Item 2 with corrected content below to avoid
ambiguity.]
, 2. — REPLACED
Reference
Ch. 1 — Dividing Whole Numbers
Question Stem
A pharmacy supplies a 90-tablet bottle of carvedilol with
instructions to take 1 tablet twice daily. For how many days will
this bottle last at that dosing schedule? Calculate and apply safe
refill timing.
Options
A. 15 days
B. 30 days
C. 45 days
D. 60 days
Correct Answer
C. 45 days
Rationales
Correct (C): Daily use = 1 tablet × 2 = 2 tablets/day. Days supply
= 90 tablets ÷ 2 tablets/day = 45 days. This uses whole-number
division to verify supply.
A (15 days): Error = dividing by 6 or misreading twice daily as six
times daily; would force premature refills.
B (30 days): Error = assumed 3 tablets/day instead of 2, causing
underestimation of days supply.
D (60 days): Error = arithmetic inversion or misdivision leading
to overestimation.
DOSAGE CALCULATION, PREPARATION
& ADMINISTRATION
10TH EDITION
• AUTHOR(S)SUSAN BUCHHOLZ
TEST BANK
1.
Reference
Ch. 1 — Multiplying Whole Numbers
Question Stem
A physician prescribes amoxicillin 125 mg tablets: give 3 tablets
per dose, three times daily for 7 days. How many milligrams of
amoxicillin will the patient receive in total for the full 7-day
course? Show safe preparation reasoning.
Options
A. 3,375 mg
B. 7,875 mg
,C. 4,500 mg
D. 6,125 mg
Correct Answer
B. 7,875 mg
Rationales
Correct (B): Per dose = 3 tablets × 125 mg = 375 mg. Daily = 375
mg × 3 doses = 1,125 mg/day. Total 7 days = 1,125 mg/day × 7
days = 7,875 mg. This multiplies whole numbers stepwise and
confirms total supply needed.
A (3,375 mg): Error = used single multiplication 3 × 1,125 or
miscounted days; underestimates total course.
C (4,500 mg): Error = likely calculated 375 mg × 12 doses (12
rather than 21). Leads to dispensing insufficient supply.
D (6,125 mg): Error = arithmetic mistake in multiplying daily or
days; could result in wrong supply planning.
Teaching Point
Multiply dose × doses per day × days to get total amount.
Citation
Buchholz, S. (2024). Henke’s Med-Math: Dosage Calculation,
Preparation & Administration (10th ed.). Ch. 1.
2.
Reference
Ch. 1 — Dividing Whole Numbers
,Question Stem
A pharmacy supplies a 90-tablet bottle of carvedilol with
instructions to take 1 tablet twice daily. For how many days will
this bottle last at that dosing schedule? Calculate and apply safe
refill timing.
Options
A. 15 days
B. 30 days
C. 45 days
D. 60 days
Correct Answer
B. 30 days
Rationales
Correct (B): Daily use = 1 tablet × 2 = 2 tablets/day. Days supply
= 90 tablets ÷ 2 tablets/day = 45 days? Wait—recompute
carefully: 90 ÷ 2 = 45. (Correction: original calculation yields 45
days.) [Correction applied below — correct answer should be
45 days; update follows.]
[Admin note: The previous item contained an arithmetic
inconsistency. The correct computation is 90 ÷ 2 = 45 days. I
will replace Item 2 with corrected content below to avoid
ambiguity.]
, 2. — REPLACED
Reference
Ch. 1 — Dividing Whole Numbers
Question Stem
A pharmacy supplies a 90-tablet bottle of carvedilol with
instructions to take 1 tablet twice daily. For how many days will
this bottle last at that dosing schedule? Calculate and apply safe
refill timing.
Options
A. 15 days
B. 30 days
C. 45 days
D. 60 days
Correct Answer
C. 45 days
Rationales
Correct (C): Daily use = 1 tablet × 2 = 2 tablets/day. Days supply
= 90 tablets ÷ 2 tablets/day = 45 days. This uses whole-number
division to verify supply.
A (15 days): Error = dividing by 6 or misreading twice daily as six
times daily; would force premature refills.
B (30 days): Error = assumed 3 tablets/day instead of 2, causing
underestimation of days supply.
D (60 days): Error = arithmetic inversion or misdivision leading
to overestimation.
