Let's solve each question step by step with clear explanations.
---
1. Chandra weighs 130 lbs. How many kg does she weigh?
Conversion factor:
1 kg ≈ 2.20462 lbs
So, to convert pounds to kilograms:
$$
\text{Weight in kg} = \frac{\text{Weight in lbs}}{2.20462}
$$
$$
\frac{130}{2.20462} \approx 59 \, \text{kg}
$$
✔ Answer: a. 59 kg
---
2. TJ weighs 70 kg. How many pounds does he weigh?
Use the same conversion:
1 kg ≈ 2.20462 lbs
$$
70 \times 2.20462 \approx 154.32 \, \text{lbs}
$$
Rounded to nearest whole number:
154 lbs
✔ Answer: b. 154 lbs
---
3. How many milliliters is 12 ounces?
Conversion factor:
1 fluid ounce ≈ 29.5735 mL
$$
12 \times 29.5735 \approx 354.88 \, \text{mL}
$$
But wait — let’s check the options:
a. 60 mL
b. 120 mL
c. 180 mL
d. 360 mL
The closest is
360 mL, but that’s not exact. However, sometimes approximations are used:
Some sources use
1 oz ≈ 30 mL, so:
$$
12 \times 30 = 360 \, \text{mL}
$$
This is a common approximation in medical settings.
✔ Answer: d. 360 mL
---
4. How many milliliters is 10 teaspoons?
Conversion factor:
1 teaspoon ≈ 5 mL
$$
10 \times 5 = 50 \, \text{mL}
$$
✔ Answer: d. 50 mL
---
5. How many ounces is 2160 mL?
We know:
1 fluid ounce ≈ 29.5735 mL
So:
$$
\frac{2160}{29.5735} \approx 72.73 \, \text{ounces}
$$
Closest option:
72 ounces
Alternatively, using approximation:
If 1 oz ≈ 30 mL, then:
$$
\frac{2160}{30} = 72 \, \text{oz}
$$
✔ Answer: c. 72 ounces
---
6. How many ounces is 1440 mL?
Using same logic:
$$
\frac{1440}{29.5735} \approx 48.68 \, \text{oz}
$$
Or using 30 mL per oz:
$$
\frac{1440}{30} = 48 \, \text{oz}
$$
✔ Answer: d. 48 ounces
---
7. The physician orders 200 mg of an antibiotic in liquid form for a pediatric patient. The only available dosage is 250 mg/5 mL. How many mL should the patient receive?
We have:
- Desired dose: 200 mg
- Available concentration: 250 mg / 5 mL
Set up a proportion:
$$
\frac{250 \, \text{mg}}{5 \, \text{mL}} = \frac{200 \, \text{mg}}{x \, \text{mL}}
$$
Cross-multiply:
$$
250x = 1000 \Rightarrow x = \frac{1000}{250} = 4 \, \text{mL}
$$
✔ Answer: c. 4 mL
---
✔ Final Answers:
1.
a. 59 kg
2.
b. 154 lbs
3.
d. 360 mL
4.
d. 50 mL
5.
c. 72 ounces
6.
d. 48 ounces
7.
c. 4 mL
Let me know if you'd like this as a printable answer key!
Parent Tip: Review the logic above to help your child master the concept of nursing math worksheet.
