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Test Bank - Dosage Calc 360°, 3rd Edition (Martinez de Castillo, 2023), Module 1-18 | All Chapters

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TEST BANK
Dosage Calc 360°


Sandra Luz Martinez de CastilloRN, and Maryanne Werner-McCullough

3rd Edition

,Table of Contents

Module 01 Basic Math 1
Module 02 Safety in Medication Administration 8
Module 03 Systems of Measurement 19
Module 04 Linear Ratio and Proportion 29
Module 05 Fractional Ratio and Proportion 37
Module 06 Dimensional Analysis 46
Module 07 Formula Method 55
Module 08 Safety in Medication Administration 65
Module 09 Syringes and Needles 75
Module 10 Calculating Parenteral Medication Doses 84
Module 11 Preparing Powdered Parenteral Medications 93
Module 12 Administering Insulin 104
Module 13 Calculating for IV Medications and Infusions 113
Module 14 Administering Direct IV Medications 129
Module 15 Verifying Safe Dose 143
Module 16 Titration of Intravenous Medications 158
Module 17 Calculating Intake and Output 172
Module 18 Calculating for Special Populations 191

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Test Bank - Dosage Calc 360°, 3rd Edition (Martinez de Castillo, 2023)

Module 1: Basic Math


MULTIPLE CHOICE

1. Which number would be categorized as an integer?
A. 8
B. 1/8
C. 0.25
D. 7 2/15
ANS: A
Module: Basic Math
Topic: Introduction to Fractions

Feedback
An integer is a number without any fractions or decimals. The number 8 is an integer.
The other choices contain either a fraction or a decimal.

2. The chef cuts pizzas into slices. Which fraction of a pizza has pieces that are the smallest in
size?
A. 1/4
B. 1/8
C. 1/10
D. 1/16
ANS: D
Module: Basic Math
Topic: Introduction to Fractions

Feedback
With fractions, the larger the denominator, the smaller the size of the pieces of the An
integer is a number without any fractions or decimals. The number 8 is an integer. The
other choices contain either a fraction or a decimal.

3. Which fraction is the smallest reduction of the number 24/36?
A. 1/2
B. 2/3
C. 3/6
D. 12/18
ANS: B
Module: Basic Math
Topic: Introduction to Fractions

Feedback
To reduce a fraction, find the largest number that will divide evenly into both the
numerator and the denominator. For the fraction 24/36, the largest number is 12. When
12 is divided into the numerator, 24 is reduced to 2. When 12 is divided into the
denominator, 36 is reduced to 3. The fraction is then 2/3. The smallest reduction of the



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number 24/36 is 2/3.




4. Which number is equivalent to the improper fraction 48/10?
A. 1 19/5
B. 2 24/5
C. 3 16/3
D. 4 4/5
ANS: D
Module: Basic Math
Topic: Introduction to Fractions

Feedback
To convert an improper fraction, divide the numerator by the denominator or 48
divided by 10 = 4 with the remainder of 8. The whole number is 4 and the fractional
remainder is 8/10. Then when reducing the fraction by 2, the fraction is now 4/5. The
improper fraction of 48/10 is equal to 4 4/5.

5. Which improper fraction is equivalent to the mixed number 5 1/7?
A. 35/8
B. 36/7
C. 40/12
D. 41/13
ANS: B
Module: Basic Math
Topic: Introduction to Fractions

Feedback
To convert a mixed number to an improper fraction, multiply the denominator of the
fraction by the whole number or 5 x 7 = 35. Then add this number to the numerator of
the fraction or 35 + 1 = 36. The denominator will stay the same. The improper fraction
for the mixed number 5 1/7 is 36/7.

6. Which number would be the common denominator for the fractions 6/7 and 3/4?
A. 11
B. 20
C. 22
D. 28
ANS: D
Module: Basic Math
Topic: Calculations with Fractions

Feedback
When two fractions have unlike denominators, a common denominator needs to be
determined. For the fractions 6/7 and 3/4, the common denominator is 28 and is found



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Test Bank - Dosage Calc 360°, 3rd Edition (Martinez de Castillo, 2023)

by multiplying the two denominators or 7 x 4 = 28.

7. What is the answer for the problem 5/3 + 7/9?
A. 2 4/9
B. 2 7/11
C. 3 5/7
D. 3 11/13
ANS: A
Module: Basic Math
Topic: Calculations with Fractions

Feedback
First, calculate the common denominator, which would be 3 x 9 = 27. Then, calculate the
first fraction by multiplying the numerator by the denominator of the second fraction or 5
x 9 = 45. The first fraction is 45/27. The second numerator is determined by multiplying
it by the first denominator or 7 x 3 = 21. The second fraction is 21/27. Now solve the
equation 45/27 + 21/27 = 66/27. This is an improper fraction that can be reduced by
dividing 27 into 66 or 2 12/27. The fraction 12/27 can be further reduced by dividing
both the numerator and denominator by the number 3. The reduced fraction is now 4/9.
The total number is 2 4/9.

8. What is the answer for the problem 11/17 – 3/5?
A. 5/23
B. 17/37
C. 7/51
D. 4/85
ANS: D
Module: Basic Math
Topic: Calculations with Fractions

Feedback
First, calculate the common denominator, which would be 17 x 5 = 85. Then, calculate
the equivalent fractions: 11 x 5 = 55 and 3 x 17 = 51. The new equation would be 55/85
– 51/85 = 4/85.

9. What is the answer for the problem 3 4/9 x 4/11?
A. 1 25/99
B. 2 11/17
C. 3 5/19
D. 4 23/102
ANS: A
Module: Basic Math
Topic: Calculations with Fractions

Feedback
First, convert the mixed number to an improper fraction or 3 x 9 = 27. Then, add the



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Test Bank - Dosage Calc 360°, 3rd Edition (Martinez de Castillo, 2023)

nominator to the total or 27 + 4 = 31/9. Now the fractions can be multiplied or 31 x 4 =
124 and 9 x 11 = 99. The answer is 124/99. When reducing this fraction, the answer is 1
25/99. The fraction 25/99 is the lowest form.

10. What is the answer for the problem 3 7/9 ÷ 2/3?
A. 3 7/8
B. 4 5/9
C. 5 2/3
D. 6 4/11
ANS: C
Module: Basic Math
Topic: Calculations with Fractions

Feedback
First, convert the mixed number to an improper fraction or 3 x 9 = 27. Then, add the
nominator to the total or 27 + 7 = 34/9. Now the fractions can be divided by inverting
the second fraction or 34/9 x 3/2 = 102/18. When reducing to the lowest terms, the
answer is 5 12/18. With further reduction, the answer is 5 2/3.

11. Which decimal number is written correctly?
A. 0.4
B. 0.40
C. .040
D. .0400
ANS: A
Module: Basic Math
Topic: Introduction to Decimals

Feedback
When a decimal fraction does not contain a whole number, a zero is placed in front of
the decimal point. If the calculation results in zeros at the end of the fraction, these zeros
should be deleted.

12. Which decimal number has a higher value?
A. 0.825
B. 0.839
C. 0.862
D. 0.887
ANS: D
Module: Basic Math
Topic: Introduction to Decimals

Feedback
Begin by looking at the value of the number in the tenths place. All are 8. Then, look at
the numbers in the hundredths place. The number that is greater is the answer choice
0.887. This is the number with the highest value.



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Test Bank - Dosage Calc 360°, 3rd Edition (Martinez de Castillo, 2023)


13. Which decimal number has the lowest value?
A. 0.317
B. 0.308
C. 0.346
D. 0.359
ANS: B
Module: Basic Math
Topic: Introduction to Decimals

Feedback
Begin by looking at the value of the number in the tenths place. All are 3. Then, look
at the numbers in the hundredths place. The number that is the lowest is the answer
choice 0.308. This is the number with the lowest value.

14. Which decimal number has the highest value?
A. 4.025
B. 4.075
C. 4.055
D. 4.065
ANS: B
Module: Basic Math
Topic: Introduction to Decimals

Feedback
Begin by noticing that all of the numbers have a whole number. Then, look at the tenth
place and see that all numbers have a 0. Next, look at the numbers in the hundredth place.
The one with the largest number is 4.075. This is the number with the highest value.

15. Which decimal number has the lowest value?
A. 7.025
B. 7.069
C. 7.008
D. 7.033
ANS: C
Module: Basic Math
Topic: Introduction to Decimals

Feedback
Begin by noticing that all of the numbers have a whole number. Then, look at the tenth
place and see that all numbers have a 0. Next, look at the numbers in the hundredth place.
The one with the smallest number is 7.008. This is the number with the lowest value.

16. What is the total when adding 4.375 + 0.894?
A. 4.383
B. 4.464
C. 5.269


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Test Bank - Dosage Calc 360°, 3rd Edition (Martinez de Castillo, 2023)

D. 13.315
ANS: C
Module: Basic Math
Topic: Calculations with Decimals

Feedback
When adding numbers with decimals, remember to line up the decimal point. Zeros can
also be used as place holders to avoid misaligning the decimals when adding. The
number 4.375 + 0.894 = 5.269.

17. What is the total for the problem 17.388 – 5.693?
A. 11.695
B. 12.305
C. 16.818
D. 23.081
ANS: A
Module: Basic Math
Topic: Calculations with Decimals

Feedback
When subtracting numbers with decimals, remember to line up the decimal point. Zeros
can also be used as place holders to avoid misaligning the decimals when adding. The
number 17.388 – 5.693 = 11.695.

18. What is the total for the problem 3.275 x 11.04?
A. 0.373
B. 3.733
C. 37.335
D. 373.35
ANS: C
Module: Basic Math
Topic: Calculations with Decimals

Feedback
When multiplying numbers with decimals, the numbers do not need to be aligned. The
equation would be
3.275
x 11.4
13100
32750
+ 327500
373350
Then, count the number of decimal places in both of the original numbers: four. Then,
starting from the right end of the answer, count four places moving toward the left. The
answer is 37.3350, but the trailing zero is to be eliminated, so the final answer is 37.335.

19. What is the total for the problem 253 ÷ 46?


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Test Bank - Dosage Calc 360°, 3rd Edition (Martinez de Castillo, 2023)

A. 0.055
B. 0.55
C. 5.5
D. 55
ANS: C
Module: Basic Math
Topic: Calculations with Decimals

Feedback
When dividing numbers, the decimal point is placed at the end of the dividend, or after
239, and is placed in the same location for the quotient. The equation would be:




The final answer is 5.5.

20. What is the number if 13.005 is rounded to the hundredth place?
A. 13.01
B. 13.004
C. 13.015
D. 13.0015
ANS: A
Module: Basic Math
Topic: Calculations with Decimals

Feedback
When rounding numbers, first determine the location of the decimal point. For
hundredths, there should be two places to the right of the decimal point. Then, look at the
number to the right of the hundredth place. Since the number is 5, add 1 to the number
and drop the 5. The number 13.005 rounded to the hundredth place is 13.01.




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Test Bank - Dosage Calc 360°, 3rd Edition (Martinez de Castillo, 2023)

Module 2: Safety in Medication Administration


MULTIPLE CHOICE

1. The following medication order is in the patient’s medication administration record (MAR):

methylPREDnisolone 40 mg PO daily at 0900.

After reading the order, the nurse correctly determines:
A. “PO” is an inappropriate abbreviation.
B. The medication order is written correctly.
C. 40 mg should be written as 40mg.
D. Tall man lettering indicates that the drug is a narcotic.
ANS: B
Module: Safety in Medication Administration
Topic: Preventing Medication Errors

Feedback
The medication order has all the required components (i.e., drug name, dose, route, and
frequency of administration) for a drug order. “PO” is an appropriate abbreviation; 40
mg is written correctly with a space between the dose and the unit of measurement. Tall
man lettering is used to distinguish the drug from another drug with a similar name.

2. Which statement accurately describes the “Boxed Warning” found on a drug label?
A. It is primarily used to identify the safe dose for the patient.
B. It is commonly found on all drug labels.
C. It identifies serious potential risks and side effects related to drug use.
D. It protects the patient by providing information to decrease side effects.
ANS: C
Module: Safety in Medication Administration
Topic: Preventing Medication Errors

Feedback
A drug label with a boxed warning provides information to healthcare professionals and
patients regarding the serious risks and side effects related to the drug. The Boxed
Warning is not the primary source for identifying the patient’s drug dosage. The warning
is found on specific prescription medications and does not provide information to reduce
or decrease side effects.

3. When practicing safety in the administration of medication, for which medication order
should a nurse seek clarification before the administration of the medication?
A. Regular insulin 5 u subcut now.
B. Enoxaparin 80 mg SUBQ every 12 hours.
C. Benadryl 50 mg PO as needed every 6 hr for itching.
D. Ondansetron 4 mg IVP stat.
ANS: A



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