Rounding
What is 0.03 rounded to the nearest hundreth?
0.03
A client weighs 154 lb and is prescribed enoxaparin 1 mg/kg subcutaneously, given q8hr.
What is the number of milligrams per dose, rounded to the nearest tenth.
154 ÷ 2.2 = 70 kg
70 × 1 = 70 mg
A nurse is caring for a client with type 2 diabetes who has an order for regular insulin per sliding scale and rapid-acting insulin for carbohydrate coverage.
The carbohydrate coverage order is 1 unit of insulin for every 15 g of carbohydrates consumed.
The client’s premeal blood glucose is 178 mg/dL.
Sliding scale (regular insulin):
80–150: 0 units
151–189: 1 unit
190–220: 2 units
The client consumes 45 g of carbohydrates for lunch.
The total number of units of insulin the nurse should plan to administer, rounded to the nearest whole unit.
Carb coverage:
45 ÷ 15 = 3 units
Sliding scale (178 mg/dL):
1 unit
Total = 4 units
A client consumes 8 oz juice and 6 oz milk.
The total intake in milliliters.
14 oz × 30 = 420 mL
A nurse is preparing to administer acetaminophen 325 mg PO to a client. The available liquid concentration is 160 mg per 5 mL.
How many milliliters should the nurse administer?
325 mg × (5 mL ÷ 160 mg) = 10 mL
What is 0.25 rounded to the nearest tenth?
0.3
A child is prescribed ibuprofen 10 mg/kg PO given every 6 hours. The child weighs 22 lb.
How many milligrams should the nurse administer per dose?
100 mg
A nurse is reviewing the MAR for a client with type 2 diabetes who is ordered sliding scale regular insulin and rapid-acting insulin for carbohydrate coverage.
The carbohydrate coverage order is 1 unit for every 12 g of carbohydrates consumed.
The client’s premeal blood glucose is 214 mg/dL.
Sliding scale:
150–199: 2 units
200–249: 4 units
For dinner, the client consumes 60 g of carbohydrates.
The total number of units of insulin the nurse should administer.
Carb coverage:
60 ÷ 12 = 5 units
Sliding scale (214 mg/dL):
4 units
Total = 9 units
A client consumes 12 oz soda, 4 oz broth, and 8 oz ice chips.
The total intake in milliliters.
Ice: 8 oz → 4 oz = 120 mL
Other: 16 oz × 30 = 480 mL
Total = 600 mL
A nurse is preparing to administer ibuprofen 600 mg PO to a client. The available liquid concentration is 100 mg per 5 mL.
How many milliliters should the nurse administer?
600 mg × (5 mL ÷ 100 mg) = 30 mL
What is 1.562 rounded to the nearest tenth?
1.6
A child is prescribed acetaminophen 15 mg/kg PO given every 4 hr. The child weighs 33 lb.
How many milligrams should the nurse administer per dose?
225 mg per dose
A nurse is caring for a client with type 2 diabetes who receives regular insulin per sliding scale and rapid-acting insulin for carbohydrate coverage.
The carbohydrate coverage order is 1 unit per 10 g of carbohydrates consumed.
The client’s premeal blood glucose is 236 mg/dL.
Sliding scale:
190–229: 2 units
230–269: 3 units
For lunch, the client eats 75 g of carbohydrates.
The total number of units of insulin the nurse should plan to administer.
Carb coverage:
75 ÷ 10 = 7.5 → 8 units
Sliding scale (236 mg/dL):
3 units
Total = 11 units
A client consumes 6 oz tea, 8 oz juice, and receives an IV bolus of 250 mL.
The total intake in milliliters.
Oral: 14 oz × 30 = 420 mL
IV: 250 mL
Total = 670 mL
A nurse is preparing to administer diphenhydramine 50 mg PO to a client. The available liquid concentration is 12.5 mg per 5 mL.
How many milliliters should the nurse administer?
20 mL
What is 1.3245 rounded to the nearest whole number?
1
A child is prescribed amoxicillin 40 mg/kg/day PO, divided every 12 hours. The child weighs 44 lb.
How many milligrams should the nurse administer per dose?
400 mg per dose
A nurse reviews the MAR for a client with type 2 diabetes who has orders for sliding scale regular insulin and rapid-acting insulin for carbohydrate coverage.
The carbohydrate coverage order is 1 unit per 8 g of carbohydrates consumed.
The client’s premeal blood glucose is 248 mg/dL.
Sliding scale:
200–249: 4 units
250–299: 6 units
The client consumes 64 g of carbohydrates for dinner.
The total number of units of insulin the nurse should administer, rounded to the nearest whole unit.
Carb coverage:
64 ÷ 8 = 8 units
Sliding scale (248 mg/dL):
4 units
Total = 12 units
A nurse documents 10 mL medication flush, 8 oz ice chips, and IV fluids at 50 mL/hr for 6 hours.
The total intake in milliliters.
IV: 300 mL
Ice: 120 mL
Flush: 10 mL
Total = 430 mL
A nurse is preparing to administer phenytoin 300 mg via a gastrostomy tube. The available oral solution concentration is 25 mg per 5 mL.
How many milliliters should the nurse administer per dose?
300 mg × (5 mL ÷ 25 mg) = 60 mL
What is 2.5678910 rounded to the nearest hundreth?
2.57
A child is prescribed gentamicin 24 mg/kg/day IV, divided every 6 hours. The child weighs 66 lb.
How many milligrams should the nurse administer per dose?
180 mg per dose
A nurse is preparing to administer insulin to a client with type 2 diabetes who has orders for regular insulin using a sliding scale and rapid-acting insulin for carbohydrate coverage.
The carbohydrate coverage order states 1 unit of insulin for every 10 g of carbohydrates consumed.
The client’s premeal blood glucose is 271 mg/dL.
Sliding scale:
200–249: 4 units
250–280: 6 units
280: Call provider
For dinner, the client consumes 90 g of carbohydrates.
The total number of units of insulin the nurse should plan to administer.
Carb coverage:
90 ÷ 10 = 9 units
Sliding scale (271 mg/dL):
6 units
Total = 15 units
A client consumes 12 oz soda, 6 oz yogurt, 8 oz ice chips, and receives IV fluids at 75 mL/hr for 4 hours.
The total intake in milliliters.
Oral: 18 oz × 30 = 540 mL
Ice: 120 mL
IV: 300 mL
Total = 960 mL
A nurse is preparing to administer prednisolone 22.5 mg PO to a client. The available liquid concentration is 15 mg per 5 mL.
How many milliliters should the nurse administer?
22.5 mg × (5 mL ÷ 15 mg) = 7.5 mL