TESTBANK FOR CALCULATE WITH CONFIDENCE, 8TH EDITION
, Table of Contents
Calculate with Confidence, 8th Edition
O i inal NCLE -Style Dosa e Calculations Exam Bank
O i inal P actice Questions with Detailed Rationales
Unit I – Math Review
Chapte 1: F actions
Chapte 2: Decimals
Chapte 3: Ratio and P opo tion
Chapte 4: Pe centa es
Unit II – Systems of Measu ement
Chapte 5: Met ic System
Chapte 6: Apotheca y and Household Systems
Chapte 7: Conve tin Within and Between Systems
Chapte 8: Additional Conve sions Useful in the Health Ca e Settin
Unit III – Methods of Administ ation and Calculation
Chapte 9: Medication Administ ation
Chapte 10: Unde standin and Inte p etin Medication O de s
Chapte 11: Medication Administ ation Reco ds and D u Dist ibution Systems
Chapte 12: Readin Medication Labels
Chapte 13: Dosa e Calculation Usin the Ratio and P opo tion Method
Chapte 14: Dosa e Calculation Usin the Fo mula Method
Chapte 15: Dosa e Calculation Usin the Dimensional Analysis Method
Unit IV – O al and Pa ente al Dosa e Fo ms, Insulin, and Pediat ic Dosa e Calculations
,Chapte 16: Calculation of O al Medications
Chapte 17: Pa ente al Medications
Chapte 18: Reconstitution of Solutions
Chapte 19: Insulin
Unit V – Int avenous, Hepa in, C itical Ca e, and Wei ht-Based Dosa e Calculations
Chapte 20: Int avenous Solutions and Equipment
Chapte 21: Basic Int avenous Calculations
Chapte 22: Hepa in Calculations
Chapte 23: C itical Ca e Calculations
Chapte 24: Pediat ic and Adult Dosa e Calculation Based on Wei ht
Exam Bank Featu es
• Detailed Rationales fo Eve y Answe
• Medication Safety Tips Th ou hout
• P o essive Lea nin f om Basic Mathematics to Advanced Dosa e Calculations
• Cove s O al, Pa ente al, Int avenous, Hepa in, C itical Ca e, and Wei ht-Based Dosa e
Calculations
• Ideal fo NCLE -RN , NCLE -PN , ATI , HESI , Kaplan , Saunde s , Nu sin
School Exams, and Clinical Competency Assessments
Unit I – Math Review
Chapter 1: Fractions
Question 1
A nurse must administer ¾ tablet of a prescribed medication. The available tablet is scored for accurate
splitting. Which decimal is equivalent to ¾, allowing the nurse to verify the correct dose?
A. 0.25
,B. 0.50
C. 0.75
D. 0.80
Correct Answer: C
Rationale:
To convert a fraction to a decimal, divide the numerator by the denominator:
3 ÷ 4 = 0.75
Therefore, ¾ tablet = 0.75 tablet. Understanding fraction-to-decimal conversions is fundamental to safe
medication dosage calculations because many electronic medication systems and infusion devices display
decimal values.
Why the other options are less appropriate:
• A. 0.25 represents ¼, not ¾.
• B. 0.50 represents ½, not ¾.
• D. 0.80 is not equivalent to ¾ and would result in an incorrect dose.
Medication Safety Tip
Never estimate fractional doses. When converting fractions to decimals, always perform the calculation or
verify it with a calculator if permitted by your institution. An incorrect conversion can lead to underdosing or
overdosing.
Question 2
A medication order requires ½ teaspoon (tsp) of liquid medication. Before measuring the dose, the nurse
recognizes that ½ is equivalent to which decimal?
A. 0.25
B. 0.40
C. 0.75
D. 0.50
Correct Answer: D
Rationale:
A fraction is converted to a decimal by dividing the numerator by the denominator:
1 ÷ 2 = 0.50
,Recognizing common fraction-decimal equivalents helps nurses perform medication calculations quickly and
accurately.
Why the other options are less appropriate:
• A. 0.25 equals ¼.
• B. 0.40 is not equal to ½.
• C. 0.75 equals ¾.
Medication Safety Tip
Memorize common fraction-decimal equivalents such as ¼ = 0.25, ½ = 0.50, ¾ = 0.75, and ⅛ = 0.125. Rapid
recognition reduces calculation errors during medication administration.
Question 3
A patient is prescribed ⅜ tablet of a medication. Before preparing the dose, the nurse converts the fraction into
a decimal. Which value is correct?
A. 0.625
B. 0.375
C. 0.500
D. 0.875
Correct Answer: B
Rationale:
Convert the fraction by dividing:
3 ÷ 8 = 0.375
Accurate fraction-to-decimal conversion is essential when verifying doses or using electronic medication
administration systems.
Why the other options are less appropriate:
• A. 0.625 equals ⅝.
• C. 0.500 equals ½.
• D. 0.875 equals ⅞.
Medication Safety Tip
If a calculated dose requires an unusual tablet fraction that cannot be safely measured, verify whether another
tablet strength or dosage form is available before administering the medication.
,Question 4
A nurse reviews a medication order for ⅔ tablet. Which decimal most closely represents this fraction?
A. 0.33
B. 0.50
C. 0.67
D. 0.83
Correct Answer: C
Rationale:
Divide the numerator by the denominator:
2 ÷ 3 = 0.666..., which rounds to 0.67.
Understanding repeating decimals helps nurses avoid rounding errors that could affect medication accuracy.
Why the other options are less appropriate:
• A. Represents approximately ⅓.
• B. Represents ½.
• D. Represents approximately ⅚.
Medication Safety Tip
Round medication calculations only according to institutional policy or drug-specific guidelines. Never round
prematurely during intermediate calculation steps.
Question 5
During a medication review, a nursing student states that ⅕ tablet is equal to 0.2 tablet. How should the
instructor respond?
A. The conversion is correct.
B. The correct decimal is 0.25.
C. The correct decimal is 0.15.
D. The correct decimal is 0.5.
Correct Answer: A
Rationale:
,Divide the numerator by the denominator:
1 ÷ 5 = 0.20
The student's conversion is accurate. Mastery of simple fraction conversions provides the mathematical
foundation for more advanced dosage calculations.
Why the other options are less appropriate:
• B. 0.25 equals ¼.
• C. 0.15 is not equivalent to ⅕.
• D. 0.50 equals ½.
Medication Safety Tip
Strong medication calculation skills begin with mastering basic mathematics. Reviewing fraction, decimal, and
percentage conversions regularly helps prevent medication errors in clinical practice.
Question 6
A nurse must administer ⅞ tablet of a medication. Before preparing the dose, the nurse converts the fraction
into a decimal. Which value is correct?
A. 0.875
B. 0.625
C. 0.750
D. 0.800
Correct Answer: A
Rationale:
Convert the fraction by dividing the numerator by the denominator:
7 ÷ 8 = 0.875
Converting fractions accurately allows nurses to verify medication doses and identify possible calculation errors
before administration.
Why the other options are less appropriate:
• B. 0.625 represents ⅝.
• C. 0.750 represents ¾.
• D. 0.800 is not equal to ⅞.
Medication Safety Tip
,Always perform dosage calculations independently before comparing your answer with another healthcare
professional. Independent verification helps identify calculation errors.
Question 7
A medication order requires ⅝ tablet. Which decimal should the nurse document while verifying the dose?
A. 0.500
B. 0.375
C. 0.625
D. 0.875
Correct Answer: C
Rationale:
To convert a fraction into a decimal:
5 ÷ 8 = 0.625
Knowing common fraction equivalents improves speed and confidence during medication preparation.
Why the other options are less appropriate:
• A. Represents ½.
• B. Represents ⅜.
• D. Represents ⅞.
Medication Safety Tip
Never assume that a decimal displayed by an electronic medication system is correct. Nurses remain
responsible for verifying all medication calculations.
Question 8
A student nurse converts ⅖ into a decimal before calculating a medication dose. Which answer is correct?
A. 0.25
B. 0.60
C. 0.50
D. 0.40
Correct Answer: D
,Rationale:
Divide the numerator by the denominator:
2 ÷ 5 = 0.40
Accurate fraction conversions form the basis of many dosage calculations involving tablets and liquid
medications.
Why the other options are less appropriate:
• A. Represents ¼.
• B. Represents ⅗.
• C. Represents ½.
Medication Safety Tip
Double-check every fraction conversion before using it in a dosage calculation. A small mathematical error can
significantly affect patient safety.
Question 9
A patient requires ⅛ tablet of a medication. Which decimal represents this fraction?
A. 0.125
B. 0.250
C. 0.175
D. 0.875
Correct Answer: A
Rationale:
Divide the numerator by the denominator:
1 ÷ 8 = 0.125
Fractions involving eighths are frequently encountered when calculating pediatric and low-dose medications.
Why the other options are less appropriate:
• B. Represents ¼.
• C. Is not equivalent to ⅛.
• D. Represents ⅞.
Medication Safety Tip
, Avoid rounding decimal values unless instructed by institutional policy or medication-specific guidelines.
Maintaining precision improves dosing accuracy.
Question 10
A nurse reviews several fraction-to-decimal conversions completed by a student. Which conversion is incorrect?
A. ¼ = 0.25
B. ¾ = 0.75
C. ⅜ = 0.375
D. ⅔ = 0.60
Correct Answer: D
Rationale:
The fraction ⅔ equals 0.666..., which is commonly rounded to 0.67, not 0.60. Recognizing incorrect conversions
is essential because inaccurate mathematics can lead directly to medication errors.
Why the other options are less appropriate:
• A. Correct conversion.
• B. Correct conversion.
• C. Correct conversion.
Medication Safety Tip
When reviewing medication calculations, verify both the mathematical steps and the final answer. Many
medication errors occur because nurses check only the final value rather than the calculation process.
Question 11
A nurse reviews a medication order requiring ⅗ tablet. Before preparing the medication, the nurse converts the
fraction to a decimal. Which decimal is correct?
A. 0.80
B. 0.40
C. 0.60
D. 0.30
, Table of Contents
Calculate with Confidence, 8th Edition
O i inal NCLE -Style Dosa e Calculations Exam Bank
O i inal P actice Questions with Detailed Rationales
Unit I – Math Review
Chapte 1: F actions
Chapte 2: Decimals
Chapte 3: Ratio and P opo tion
Chapte 4: Pe centa es
Unit II – Systems of Measu ement
Chapte 5: Met ic System
Chapte 6: Apotheca y and Household Systems
Chapte 7: Conve tin Within and Between Systems
Chapte 8: Additional Conve sions Useful in the Health Ca e Settin
Unit III – Methods of Administ ation and Calculation
Chapte 9: Medication Administ ation
Chapte 10: Unde standin and Inte p etin Medication O de s
Chapte 11: Medication Administ ation Reco ds and D u Dist ibution Systems
Chapte 12: Readin Medication Labels
Chapte 13: Dosa e Calculation Usin the Ratio and P opo tion Method
Chapte 14: Dosa e Calculation Usin the Fo mula Method
Chapte 15: Dosa e Calculation Usin the Dimensional Analysis Method
Unit IV – O al and Pa ente al Dosa e Fo ms, Insulin, and Pediat ic Dosa e Calculations
,Chapte 16: Calculation of O al Medications
Chapte 17: Pa ente al Medications
Chapte 18: Reconstitution of Solutions
Chapte 19: Insulin
Unit V – Int avenous, Hepa in, C itical Ca e, and Wei ht-Based Dosa e Calculations
Chapte 20: Int avenous Solutions and Equipment
Chapte 21: Basic Int avenous Calculations
Chapte 22: Hepa in Calculations
Chapte 23: C itical Ca e Calculations
Chapte 24: Pediat ic and Adult Dosa e Calculation Based on Wei ht
Exam Bank Featu es
• Detailed Rationales fo Eve y Answe
• Medication Safety Tips Th ou hout
• P o essive Lea nin f om Basic Mathematics to Advanced Dosa e Calculations
• Cove s O al, Pa ente al, Int avenous, Hepa in, C itical Ca e, and Wei ht-Based Dosa e
Calculations
• Ideal fo NCLE -RN , NCLE -PN , ATI , HESI , Kaplan , Saunde s , Nu sin
School Exams, and Clinical Competency Assessments
Unit I – Math Review
Chapter 1: Fractions
Question 1
A nurse must administer ¾ tablet of a prescribed medication. The available tablet is scored for accurate
splitting. Which decimal is equivalent to ¾, allowing the nurse to verify the correct dose?
A. 0.25
,B. 0.50
C. 0.75
D. 0.80
Correct Answer: C
Rationale:
To convert a fraction to a decimal, divide the numerator by the denominator:
3 ÷ 4 = 0.75
Therefore, ¾ tablet = 0.75 tablet. Understanding fraction-to-decimal conversions is fundamental to safe
medication dosage calculations because many electronic medication systems and infusion devices display
decimal values.
Why the other options are less appropriate:
• A. 0.25 represents ¼, not ¾.
• B. 0.50 represents ½, not ¾.
• D. 0.80 is not equivalent to ¾ and would result in an incorrect dose.
Medication Safety Tip
Never estimate fractional doses. When converting fractions to decimals, always perform the calculation or
verify it with a calculator if permitted by your institution. An incorrect conversion can lead to underdosing or
overdosing.
Question 2
A medication order requires ½ teaspoon (tsp) of liquid medication. Before measuring the dose, the nurse
recognizes that ½ is equivalent to which decimal?
A. 0.25
B. 0.40
C. 0.75
D. 0.50
Correct Answer: D
Rationale:
A fraction is converted to a decimal by dividing the numerator by the denominator:
1 ÷ 2 = 0.50
,Recognizing common fraction-decimal equivalents helps nurses perform medication calculations quickly and
accurately.
Why the other options are less appropriate:
• A. 0.25 equals ¼.
• B. 0.40 is not equal to ½.
• C. 0.75 equals ¾.
Medication Safety Tip
Memorize common fraction-decimal equivalents such as ¼ = 0.25, ½ = 0.50, ¾ = 0.75, and ⅛ = 0.125. Rapid
recognition reduces calculation errors during medication administration.
Question 3
A patient is prescribed ⅜ tablet of a medication. Before preparing the dose, the nurse converts the fraction into
a decimal. Which value is correct?
A. 0.625
B. 0.375
C. 0.500
D. 0.875
Correct Answer: B
Rationale:
Convert the fraction by dividing:
3 ÷ 8 = 0.375
Accurate fraction-to-decimal conversion is essential when verifying doses or using electronic medication
administration systems.
Why the other options are less appropriate:
• A. 0.625 equals ⅝.
• C. 0.500 equals ½.
• D. 0.875 equals ⅞.
Medication Safety Tip
If a calculated dose requires an unusual tablet fraction that cannot be safely measured, verify whether another
tablet strength or dosage form is available before administering the medication.
,Question 4
A nurse reviews a medication order for ⅔ tablet. Which decimal most closely represents this fraction?
A. 0.33
B. 0.50
C. 0.67
D. 0.83
Correct Answer: C
Rationale:
Divide the numerator by the denominator:
2 ÷ 3 = 0.666..., which rounds to 0.67.
Understanding repeating decimals helps nurses avoid rounding errors that could affect medication accuracy.
Why the other options are less appropriate:
• A. Represents approximately ⅓.
• B. Represents ½.
• D. Represents approximately ⅚.
Medication Safety Tip
Round medication calculations only according to institutional policy or drug-specific guidelines. Never round
prematurely during intermediate calculation steps.
Question 5
During a medication review, a nursing student states that ⅕ tablet is equal to 0.2 tablet. How should the
instructor respond?
A. The conversion is correct.
B. The correct decimal is 0.25.
C. The correct decimal is 0.15.
D. The correct decimal is 0.5.
Correct Answer: A
Rationale:
,Divide the numerator by the denominator:
1 ÷ 5 = 0.20
The student's conversion is accurate. Mastery of simple fraction conversions provides the mathematical
foundation for more advanced dosage calculations.
Why the other options are less appropriate:
• B. 0.25 equals ¼.
• C. 0.15 is not equivalent to ⅕.
• D. 0.50 equals ½.
Medication Safety Tip
Strong medication calculation skills begin with mastering basic mathematics. Reviewing fraction, decimal, and
percentage conversions regularly helps prevent medication errors in clinical practice.
Question 6
A nurse must administer ⅞ tablet of a medication. Before preparing the dose, the nurse converts the fraction
into a decimal. Which value is correct?
A. 0.875
B. 0.625
C. 0.750
D. 0.800
Correct Answer: A
Rationale:
Convert the fraction by dividing the numerator by the denominator:
7 ÷ 8 = 0.875
Converting fractions accurately allows nurses to verify medication doses and identify possible calculation errors
before administration.
Why the other options are less appropriate:
• B. 0.625 represents ⅝.
• C. 0.750 represents ¾.
• D. 0.800 is not equal to ⅞.
Medication Safety Tip
,Always perform dosage calculations independently before comparing your answer with another healthcare
professional. Independent verification helps identify calculation errors.
Question 7
A medication order requires ⅝ tablet. Which decimal should the nurse document while verifying the dose?
A. 0.500
B. 0.375
C. 0.625
D. 0.875
Correct Answer: C
Rationale:
To convert a fraction into a decimal:
5 ÷ 8 = 0.625
Knowing common fraction equivalents improves speed and confidence during medication preparation.
Why the other options are less appropriate:
• A. Represents ½.
• B. Represents ⅜.
• D. Represents ⅞.
Medication Safety Tip
Never assume that a decimal displayed by an electronic medication system is correct. Nurses remain
responsible for verifying all medication calculations.
Question 8
A student nurse converts ⅖ into a decimal before calculating a medication dose. Which answer is correct?
A. 0.25
B. 0.60
C. 0.50
D. 0.40
Correct Answer: D
,Rationale:
Divide the numerator by the denominator:
2 ÷ 5 = 0.40
Accurate fraction conversions form the basis of many dosage calculations involving tablets and liquid
medications.
Why the other options are less appropriate:
• A. Represents ¼.
• B. Represents ⅗.
• C. Represents ½.
Medication Safety Tip
Double-check every fraction conversion before using it in a dosage calculation. A small mathematical error can
significantly affect patient safety.
Question 9
A patient requires ⅛ tablet of a medication. Which decimal represents this fraction?
A. 0.125
B. 0.250
C. 0.175
D. 0.875
Correct Answer: A
Rationale:
Divide the numerator by the denominator:
1 ÷ 8 = 0.125
Fractions involving eighths are frequently encountered when calculating pediatric and low-dose medications.
Why the other options are less appropriate:
• B. Represents ¼.
• C. Is not equivalent to ⅛.
• D. Represents ⅞.
Medication Safety Tip
, Avoid rounding decimal values unless instructed by institutional policy or medication-specific guidelines.
Maintaining precision improves dosing accuracy.
Question 10
A nurse reviews several fraction-to-decimal conversions completed by a student. Which conversion is incorrect?
A. ¼ = 0.25
B. ¾ = 0.75
C. ⅜ = 0.375
D. ⅔ = 0.60
Correct Answer: D
Rationale:
The fraction ⅔ equals 0.666..., which is commonly rounded to 0.67, not 0.60. Recognizing incorrect conversions
is essential because inaccurate mathematics can lead directly to medication errors.
Why the other options are less appropriate:
• A. Correct conversion.
• B. Correct conversion.
• C. Correct conversion.
Medication Safety Tip
When reviewing medication calculations, verify both the mathematical steps and the final answer. Many
medication errors occur because nurses check only the final value rather than the calculation process.
Question 11
A nurse reviews a medication order requiring ⅗ tablet. Before preparing the medication, the nurse converts the
fraction to a decimal. Which decimal is correct?
A. 0.80
B. 0.40
C. 0.60
D. 0.30
