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Math Practice Problems
1. A parent needs to give her child 2 teaspoons of a medication. This is equivalent
to how many milliliters (mL)? 10 mL
5 mL/tsp X 2 tsp
2. The medication prescription is for 5 mcg/kg/min. The solution available is 200
mg in 100 mL D5W. The client weighs 156 lb. Calculate the setting on the IV
controller. (controller allows for tenths. Round Kg. to nearest tenth.) 10.6 mL/hr
70.9 kg X 5 mcg/kg/min X 1 mg/1000 mcg X 100 mL/200 mg X 60 min/hr
3. An infant weighing 875 grams is to receive 2.5 mg/kg/dose of a medication every
4 hours. What is the total dose for this infant in one day? (round to hundredths for
this size infant) 13.13 mg/day
875 gm X 1 kg/1000 gm X 2.5 mg/kg/4 hours X 24 hours/day
4. A child weighing 28.6 lbs. is to receive 235 mg dose of a medication every 8
hours. The safe dosage range for this medication is 50-80 mg/kg/day.
What is the dosage infusing in 24 hours for this child? 705 mg/day
235 mg/8 hours X 24 hours/day
What is the safe dose range for this child? 650-1040 mg/day
13 kg X 50 mg/kg/day 13 kg X 80 mg/kg/day
5. An antibiotic is diluted in 40 mL of fluid. The tubing delivers 60 gtts/mL.
Determine the rate to deliver the medication over 1 hour in gtts/min. (Round to
the nearest whole number for gtts). 40 gtts/min
40 mL/1 hour X 1 hour/60 min X 60 gtts/mL
6. A unit of fresh frozen plasma (FFP) usually contains 250 mL of fluid. The tubing
delivers 15 gtts/mL. Determine the rate to deliver the blood over 3 hours in
gtts/min. (round to the nearest whole number) 21 gtts/min
250 mL/3 hours X 15 gtts/mL X 1 hour/60 min
7. A client consumed the following:
8 oz of milk = 240 mL 8 oz X 30 mL/oz
1 cup of coffee = 240 mL 8 oz X 30 mL/oz
6 oz of orange juice = 180 mL 6 oz X 30 mL/oz
2
4 oz water with medication = 120 mL 4 oz X 30 mL/oz
What are the total mLs you will record? 780 mL
240 + 240 + 180 + 120
8. The prescription is Diltiazem 60 mg IV push at a rate of 5 mg/min.
Diltiazem is available as 25 mg/5 mL. How many minutes will it take to
administer the ordered dose of diltiazem by IV push? 12 mins
60 mg X 1 min/5 mg
9. After reconstituting the ceftriazone vial below, how many milliliters will you draw
up to administer 600 mg of medication? (round to tenths) 1.7 mL
1 mL/350 mg X 600 mg
10.Using the label below, how many milliliters will you draw up to administer 6.25 mg?
0.25 mL
1 mL/25 mg X 6.25 mg
