TEST BANK
Henke's Med-Math: Dosage Calculation, Preparation, and
Administration
Susan Buchholz
10th Edition
,Table of Contents
Chapter 01 Arithmetic Needed for Dosage 1
Chapter 02 Metric and Household Systems of Measurement 15
Chapter 03 Drug Abbreviations, Labels, and Packaging 27
Chapter 04 Calculation of Oral Medications—Solids and Liquids 39
Chapter 05 Liquids for Injection 55
Chapter 06 Calculation of Basic IV Drip Rates 69
Chapter 07 Special Types of IV Calculations 82
Chapter 08 Dosage Problems for Infants and Children 99
Chapter 09 Information Basic to Administering Drugs 112
Chapter 10 Administration Procedures 126
,______________________________________________________________________________________________
Test Bank - Henke's Med-Math: Dosage Calculation, Preparation, and Administration, 10th Edition (Buchholz, 2024)
Chapter 01, Arithmetic Needed for Dosage
1. A patient/client was instructed to drink 750 mL of water within 2 hours but was only able to
drink 450 mL. What portion of the water remained?
A) 2/5
B) 3/5
C) 2/25
D) 25/25
ANS: A
Rationale: Subtract the quantity of water the client drank (450 mL) from the total available
quantity (750 mL): 300 mL remains. To determine the portion of the water that remains,
create a fraction by dividing 300 mL (remaining portion) by 750 mL (total portion): 300
divided by 750 = 300/750. To reduce fractions, find the largest number that can be divided
evenly into the numerator and the denominator: 50. 300 divided by 50 is 6; 750 divided by
50 is 15. The fraction 6/15 can then be reduced to its lowest terms, 2/5.
PTS: 1 REF: Page and Header: 2, Dividing Whole Numbers; 3, Fractions
OBJ: 1 NAT: Client Needs: Physiological Integrity: Basic Care and Comfort
TOP: Chapter: 1 KEY: Integrated Process: Teaching/Learning
BLM: Cognitive Level: Apply NOT: Multiple Choice
2. A patient/client was prescribed 240 mL of a nutritional shake by mouth as a supplement but
consumed only 100 mL. What portion of the nutritional shake remained?
A) 5/12
B) 7/12
C) 100/240
D) 240/240
ANS: B
Rationale: Subtract the quantity of nutritional shake the client consumed (100 mL) from the
total available quantity (240 mL): 140 mL remains. To determine the portion that remains,
create a fraction by dividing 140 mL (remaining portion) by 240 mL (total portion):
140/240. To reduce fractions, find the largest number that can be divided evenly into the
numerator and the denominator: 20. 140 divided by 20 (140/20) = 7; 240/20 = 12. The
fraction 140/240 can be reduced to its lowest terms of 7/12.
PTS: 1 REF: Page and Header: 2, Dividing Whole Numbers
OBJ: 1 NAT: Client Needs: Physiological Integrity: Basic Care and Comfort
TOP: Chapter: 1 KEY: Integrated Process: Nursing Process
BLM: Cognitive Level: Apply NOT: Multiple Choice
3. A patient/client tells the nurse, “I ate 60% of the food on my dinner tray.” The nurse
determines that the patient/client consumed what fraction of the food on the tray?
A) 1/4
B) 1/3
C) 3/5
D) 5/8
ANS: C
______________________________________________________________________________________________
1|Page
,______________________________________________________________________________________________
Test Bank - Henke's Med-Math: Dosage Calculation, Preparation, and Administration, 10th Edition (Buchholz, 2024)
Rationale: Percent refers to “parts per hundred” and reflects a fraction with a variable
number in the numerator and 100 always as the denominator. To determine the fraction,
place the percent number in the numerator and 100 in the denominator and then reduce. In
this case, the fraction would be 60/100, which would be reduced to 6/10, and then reduced
again to 3/5.
PTS: 1 REF: Page and Header: 15, Percents OBJ: 6
NAT: Client Needs: Physiological Integrity: Basic Care and Comfort
TOP: Chapter: 1 KEY: Integrated Process: Communication and Documentation
BLM: Cognitive Level: Apply NOT: Multiple Choice
4. A coffee cup holds 180 mL. The patient/client drank cups of coffee. How many
milliliters would the nurse document as consumed?
A) 360
B) 420
C) 510
D) 600
ANS: B
Rationale: The coffee cup holds 180 mL. The client drank cups. To estimate the total
number of milliliters consumed, multiply 180 ´ 7/3. When a mixed number is present,
change it to an improper fraction by multiplying the whole number by the denominator and
then adding that total to the numerator. In the example of : 2 3 = 6 + 1 = 7/3.
Therefore, 180 mL × 7/3 = 420 mL. (180 × 7 = 1260 ÷ 3 = 420).
PTS: 1 REF: Page and Header: 6, Multiplying Fractions
OBJ: 1 NAT: Client Needs: Physiological Integrity: Basic Care and Comfort
TOP: Chapter: 1 KEY: Integrated Process: Communication and Documentation
BLM: Cognitive Level: Analyze NOT: Multiple Choice
5. A patient/client weighed 48.52 kg on admission and now weighs 50.4 kg. How many
kilograms were gained since admission?
A) 0.78
B) 0.88
C) 1.88
D) 1.98
ANS: C
Rationale: To estimate the amount of kilograms gained, subtract weight on admission
(48.52) from current weight (50.4 kg). The answer is 1.88 kg (weight gained). To subtract
decimals, decimals are stacked and lined up. Starting at the far right of the stack, the
numbers are subtracted. In the answer, make sure the decimal point lines up exactly with the
points above it.
PTS: 1 REF: Page and Header: 11, Addition and Subtraction of Decimals
OBJ: 5
NAT: Client Needs: Physiological Integrity: Physiological Adaptation
TOP: Chapter: 1 KEY: Integrated Process: Nursing Process
______________________________________________________________________________________________
2|Page
,______________________________________________________________________________________________
Test Bank - Henke's Med-Math: Dosage Calculation, Preparation, and Administration, 10th Edition (Buchholz, 2024)
BLM: Cognitive Level: Apply NOT: Multiple Choice
6. In one meal, a patient/client consumed a food item with 0.004 g sodium and another food
item with 0.152 g sodium. How many grams of sodium were consumed, to the nearest
hundredth?
A) 0.15
B) 0.156
C) 0.16
D) 0.166
ANS: C
Rationale: To add decimals, stack vertically, making sure that all of the decimal points
exactly line up. Starting at the far right of the stack, add each vertical column of numbers. In
the answer, make sure the decimal point lines up exactly with the points above it. To round
off a decimal, the final number is dropped. Add 0.004 g + 0.152 g = 0.156 g (thousandth
place) to determine the total number of grams the client consumed. When the final number
(6) is 5 or greater, drop that number and increase the adjacent number (5) by 1. When you
want a number rounded off to the nearest hundredth, look at the number in the thousandth
place and follow the rounding off rule. Therefore, 0.156 = 0.16 g.
PTS: 1 REF: Page and Header: 11, Addition and Subtraction of Decimals
OBJ: 3, 5, 6
NAT: Client Needs: Physiological Integrity: Physiological Adaptation
TOP: Chapter: 1 KEY: Integrated Process: Nursing Process
BLM: Cognitive Level: Apply NOT: Multiple Choice
7. A patient/client reports drinking 30% of a 1.2-liter bottle of orange juice. The nurse reports
that the patient/client drank how many liters?
A) 0.18
B) 0.22
C) 0.36
D) 5.3
ANS: C
Rationale: Percent means "parts per hundred." Percent is a fraction, containing a variable
numerator and a denominator that always equals 100. Therefore, 30% = 30/100 (fraction),
30:100 (ratio), and 0.3 (decimal). To determine the percent of the orange juice the client
drank, multiply 30% 1.2 liters. Using the decimal format (0.3 1.2), line up the numbers
on the right. Do not align the decimal points. Starting at the right, multiply each digit in the
top number by each digit in the bottom number, just as is done with whole numbers. Add
the products. Place the decimal point in the answer by starting at the right and moving the
point the same number of places that you totaled earlier. When blank spaces are present, fill
each one with a zero. The answer is 0.36 (0.3 1.2).
PTS: 1 REF: Page and Header: 15, Percents OBJ: 6
NAT: Client Needs: Physiological Integrity: Physiological Adaptation
TOP: Chapter: 1 KEY: Integrated Process: Communication and Documentation
BLM: Cognitive Level: Apply NOT: Multiple Choice
______________________________________________________________________________________________
3|Page
, ______________________________________________________________________________________________
Test Bank - Henke's Med-Math: Dosage Calculation, Preparation, and Administration, 10th Edition (Buchholz, 2024)
8. A patient/client reports drinking 45% of a 360 mL can of soda. How many milliliters are
documented?
A) 137
B) 174
C) 162
D) 126
ANS: C
Rationale: Percent means "parts per hundred." Percent is a fraction, containing a variable
numerator and a denominator that always equals 100. Therefore, 45% = 45/100 (fraction),
45:100 (ratio), and 0.45 (decimal). To determine the percent of the soda that the client
drank, multiply 45% 360 mL. Using the decimal format (0.45 360), line up the numbers
on the right. Do not align the decimal points. Starting at the right, multiply each digit in the
top number by each digit in the bottom number, just as is done with whole numbers. Add
the products. Place the decimal point in the answer by starting at the right and moving the
point the same number of places that you totaled earlier. When blank spaces are present, fill
each one with a zero. The answer is 162 mL (0.45 360).
PTS: 1 REF: Page and Header: 15, Percents OBJ: 6
NAT: Client Needs: Physiological Integrity: Physiological Adaptation
TOP: Chapter: 1 KEY: Integrated Process: Communication and Documentation
BLM: Cognitive Level: Apply NOT: Multiple Choice
9. A patient/client is on a 1200 mL fluid restriction for 24 hours. By lunchtime, the
patient/client had consumed 3/5 of the fluid allowance. How many milliliters were
consumed?
A) 280
B) 360
C) 540
D) 720
ANS: D
Rationale: To get 3/5 of 1200 mL, set up the fraction: 3/5 × 1200/1 = 3600/5 = 720 mL.
Multiply the numerators across and then multiply the denominators across. Reduce the
answer to its lowest terms.
PTS: 1 REF: Page and Header: 6, Multiplying Fractions
OBJ: 1
NAT: Client Needs: Physiological Integrity: Physiological Adaptation
TOP: Chapter: 1 KEY: Integrated Process: Nursing Process
BLM: Cognitive Level: Apply NOT: Multiple Choice
10. A patient/client is on a 1500 mL fluid restriction for 24 hours. At 1500 hours, the client
consumed 2/3 of the fluid allowance for 24 hours. What are the maximum milliliters of fluid
remaining that the patient/client can consume during the evening shift?
A) 400
B) 450
C) 500
D) 550
______________________________________________________________________________________________
4|Page
Henke's Med-Math: Dosage Calculation, Preparation, and
Administration
Susan Buchholz
10th Edition
,Table of Contents
Chapter 01 Arithmetic Needed for Dosage 1
Chapter 02 Metric and Household Systems of Measurement 15
Chapter 03 Drug Abbreviations, Labels, and Packaging 27
Chapter 04 Calculation of Oral Medications—Solids and Liquids 39
Chapter 05 Liquids for Injection 55
Chapter 06 Calculation of Basic IV Drip Rates 69
Chapter 07 Special Types of IV Calculations 82
Chapter 08 Dosage Problems for Infants and Children 99
Chapter 09 Information Basic to Administering Drugs 112
Chapter 10 Administration Procedures 126
,______________________________________________________________________________________________
Test Bank - Henke's Med-Math: Dosage Calculation, Preparation, and Administration, 10th Edition (Buchholz, 2024)
Chapter 01, Arithmetic Needed for Dosage
1. A patient/client was instructed to drink 750 mL of water within 2 hours but was only able to
drink 450 mL. What portion of the water remained?
A) 2/5
B) 3/5
C) 2/25
D) 25/25
ANS: A
Rationale: Subtract the quantity of water the client drank (450 mL) from the total available
quantity (750 mL): 300 mL remains. To determine the portion of the water that remains,
create a fraction by dividing 300 mL (remaining portion) by 750 mL (total portion): 300
divided by 750 = 300/750. To reduce fractions, find the largest number that can be divided
evenly into the numerator and the denominator: 50. 300 divided by 50 is 6; 750 divided by
50 is 15. The fraction 6/15 can then be reduced to its lowest terms, 2/5.
PTS: 1 REF: Page and Header: 2, Dividing Whole Numbers; 3, Fractions
OBJ: 1 NAT: Client Needs: Physiological Integrity: Basic Care and Comfort
TOP: Chapter: 1 KEY: Integrated Process: Teaching/Learning
BLM: Cognitive Level: Apply NOT: Multiple Choice
2. A patient/client was prescribed 240 mL of a nutritional shake by mouth as a supplement but
consumed only 100 mL. What portion of the nutritional shake remained?
A) 5/12
B) 7/12
C) 100/240
D) 240/240
ANS: B
Rationale: Subtract the quantity of nutritional shake the client consumed (100 mL) from the
total available quantity (240 mL): 140 mL remains. To determine the portion that remains,
create a fraction by dividing 140 mL (remaining portion) by 240 mL (total portion):
140/240. To reduce fractions, find the largest number that can be divided evenly into the
numerator and the denominator: 20. 140 divided by 20 (140/20) = 7; 240/20 = 12. The
fraction 140/240 can be reduced to its lowest terms of 7/12.
PTS: 1 REF: Page and Header: 2, Dividing Whole Numbers
OBJ: 1 NAT: Client Needs: Physiological Integrity: Basic Care and Comfort
TOP: Chapter: 1 KEY: Integrated Process: Nursing Process
BLM: Cognitive Level: Apply NOT: Multiple Choice
3. A patient/client tells the nurse, “I ate 60% of the food on my dinner tray.” The nurse
determines that the patient/client consumed what fraction of the food on the tray?
A) 1/4
B) 1/3
C) 3/5
D) 5/8
ANS: C
______________________________________________________________________________________________
1|Page
,______________________________________________________________________________________________
Test Bank - Henke's Med-Math: Dosage Calculation, Preparation, and Administration, 10th Edition (Buchholz, 2024)
Rationale: Percent refers to “parts per hundred” and reflects a fraction with a variable
number in the numerator and 100 always as the denominator. To determine the fraction,
place the percent number in the numerator and 100 in the denominator and then reduce. In
this case, the fraction would be 60/100, which would be reduced to 6/10, and then reduced
again to 3/5.
PTS: 1 REF: Page and Header: 15, Percents OBJ: 6
NAT: Client Needs: Physiological Integrity: Basic Care and Comfort
TOP: Chapter: 1 KEY: Integrated Process: Communication and Documentation
BLM: Cognitive Level: Apply NOT: Multiple Choice
4. A coffee cup holds 180 mL. The patient/client drank cups of coffee. How many
milliliters would the nurse document as consumed?
A) 360
B) 420
C) 510
D) 600
ANS: B
Rationale: The coffee cup holds 180 mL. The client drank cups. To estimate the total
number of milliliters consumed, multiply 180 ´ 7/3. When a mixed number is present,
change it to an improper fraction by multiplying the whole number by the denominator and
then adding that total to the numerator. In the example of : 2 3 = 6 + 1 = 7/3.
Therefore, 180 mL × 7/3 = 420 mL. (180 × 7 = 1260 ÷ 3 = 420).
PTS: 1 REF: Page and Header: 6, Multiplying Fractions
OBJ: 1 NAT: Client Needs: Physiological Integrity: Basic Care and Comfort
TOP: Chapter: 1 KEY: Integrated Process: Communication and Documentation
BLM: Cognitive Level: Analyze NOT: Multiple Choice
5. A patient/client weighed 48.52 kg on admission and now weighs 50.4 kg. How many
kilograms were gained since admission?
A) 0.78
B) 0.88
C) 1.88
D) 1.98
ANS: C
Rationale: To estimate the amount of kilograms gained, subtract weight on admission
(48.52) from current weight (50.4 kg). The answer is 1.88 kg (weight gained). To subtract
decimals, decimals are stacked and lined up. Starting at the far right of the stack, the
numbers are subtracted. In the answer, make sure the decimal point lines up exactly with the
points above it.
PTS: 1 REF: Page and Header: 11, Addition and Subtraction of Decimals
OBJ: 5
NAT: Client Needs: Physiological Integrity: Physiological Adaptation
TOP: Chapter: 1 KEY: Integrated Process: Nursing Process
______________________________________________________________________________________________
2|Page
,______________________________________________________________________________________________
Test Bank - Henke's Med-Math: Dosage Calculation, Preparation, and Administration, 10th Edition (Buchholz, 2024)
BLM: Cognitive Level: Apply NOT: Multiple Choice
6. In one meal, a patient/client consumed a food item with 0.004 g sodium and another food
item with 0.152 g sodium. How many grams of sodium were consumed, to the nearest
hundredth?
A) 0.15
B) 0.156
C) 0.16
D) 0.166
ANS: C
Rationale: To add decimals, stack vertically, making sure that all of the decimal points
exactly line up. Starting at the far right of the stack, add each vertical column of numbers. In
the answer, make sure the decimal point lines up exactly with the points above it. To round
off a decimal, the final number is dropped. Add 0.004 g + 0.152 g = 0.156 g (thousandth
place) to determine the total number of grams the client consumed. When the final number
(6) is 5 or greater, drop that number and increase the adjacent number (5) by 1. When you
want a number rounded off to the nearest hundredth, look at the number in the thousandth
place and follow the rounding off rule. Therefore, 0.156 = 0.16 g.
PTS: 1 REF: Page and Header: 11, Addition and Subtraction of Decimals
OBJ: 3, 5, 6
NAT: Client Needs: Physiological Integrity: Physiological Adaptation
TOP: Chapter: 1 KEY: Integrated Process: Nursing Process
BLM: Cognitive Level: Apply NOT: Multiple Choice
7. A patient/client reports drinking 30% of a 1.2-liter bottle of orange juice. The nurse reports
that the patient/client drank how many liters?
A) 0.18
B) 0.22
C) 0.36
D) 5.3
ANS: C
Rationale: Percent means "parts per hundred." Percent is a fraction, containing a variable
numerator and a denominator that always equals 100. Therefore, 30% = 30/100 (fraction),
30:100 (ratio), and 0.3 (decimal). To determine the percent of the orange juice the client
drank, multiply 30% 1.2 liters. Using the decimal format (0.3 1.2), line up the numbers
on the right. Do not align the decimal points. Starting at the right, multiply each digit in the
top number by each digit in the bottom number, just as is done with whole numbers. Add
the products. Place the decimal point in the answer by starting at the right and moving the
point the same number of places that you totaled earlier. When blank spaces are present, fill
each one with a zero. The answer is 0.36 (0.3 1.2).
PTS: 1 REF: Page and Header: 15, Percents OBJ: 6
NAT: Client Needs: Physiological Integrity: Physiological Adaptation
TOP: Chapter: 1 KEY: Integrated Process: Communication and Documentation
BLM: Cognitive Level: Apply NOT: Multiple Choice
______________________________________________________________________________________________
3|Page
, ______________________________________________________________________________________________
Test Bank - Henke's Med-Math: Dosage Calculation, Preparation, and Administration, 10th Edition (Buchholz, 2024)
8. A patient/client reports drinking 45% of a 360 mL can of soda. How many milliliters are
documented?
A) 137
B) 174
C) 162
D) 126
ANS: C
Rationale: Percent means "parts per hundred." Percent is a fraction, containing a variable
numerator and a denominator that always equals 100. Therefore, 45% = 45/100 (fraction),
45:100 (ratio), and 0.45 (decimal). To determine the percent of the soda that the client
drank, multiply 45% 360 mL. Using the decimal format (0.45 360), line up the numbers
on the right. Do not align the decimal points. Starting at the right, multiply each digit in the
top number by each digit in the bottom number, just as is done with whole numbers. Add
the products. Place the decimal point in the answer by starting at the right and moving the
point the same number of places that you totaled earlier. When blank spaces are present, fill
each one with a zero. The answer is 162 mL (0.45 360).
PTS: 1 REF: Page and Header: 15, Percents OBJ: 6
NAT: Client Needs: Physiological Integrity: Physiological Adaptation
TOP: Chapter: 1 KEY: Integrated Process: Communication and Documentation
BLM: Cognitive Level: Apply NOT: Multiple Choice
9. A patient/client is on a 1200 mL fluid restriction for 24 hours. By lunchtime, the
patient/client had consumed 3/5 of the fluid allowance. How many milliliters were
consumed?
A) 280
B) 360
C) 540
D) 720
ANS: D
Rationale: To get 3/5 of 1200 mL, set up the fraction: 3/5 × 1200/1 = 3600/5 = 720 mL.
Multiply the numerators across and then multiply the denominators across. Reduce the
answer to its lowest terms.
PTS: 1 REF: Page and Header: 6, Multiplying Fractions
OBJ: 1
NAT: Client Needs: Physiological Integrity: Physiological Adaptation
TOP: Chapter: 1 KEY: Integrated Process: Nursing Process
BLM: Cognitive Level: Apply NOT: Multiple Choice
10. A patient/client is on a 1500 mL fluid restriction for 24 hours. At 1500 hours, the client
consumed 2/3 of the fluid allowance for 24 hours. What are the maximum milliliters of fluid
remaining that the patient/client can consume during the evening shift?
A) 400
B) 450
C) 500
D) 550
______________________________________________________________________________________________
4|Page
