ATI TEAS 7
Metric Conversions for Nursing
1. How many mcg are there in 0.2 mg?
- A. 20 mcg
- B. 200 mcg
- C. 2000 mcg
- D. 2 mcg
Correct answer: B
Rationale: To convert milligrams to micrograms, you need to multiply by 1000 since 1 mg is equal to 1000 mcg. Therefore, 0.2 mg is equivalent to 200 mcg. It is crucial to understand this conversion to ensure precise medication dosages. Choice A is incorrect because it does not account for the conversion factor of 1000 between milligrams and micrograms. Choice C is incorrect as it represents the conversion of grams to micrograms. Choice D is incorrect as it does not consider the conversion factor from milligrams to micrograms.
2. What is 0.03 as a fraction?
- A. 3/100
- B. 1/30
- C. 1/3
- D. 1/10
Correct answer: A
Rationale: To convert a decimal to a fraction, you place the decimal value over a power of 10, where the number of zeros in the denominator is equal to the number of decimal places in the decimal. In this case, 0.03 can be written as 3/100 because there are two decimal places (hundredths). This fraction is already in simplest form. Choice B, 1/30, is incorrect as it represents 0.033 as a fraction. Choice C, 1/3, is incorrect as it represents 0.3 as a fraction. Choice D, 1/10, is incorrect as it represents 0.1 as a fraction.
3. Convert 0.0345 kilograms to grams (g).
- A. 3.45 grams
- B. 34.5 grams
- C. 345 grams
- D. 3450 grams
Correct answer: B
Rationale: To convert kilograms to grams, you need to multiply by 1,000 since 1 kilogram is equal to 1,000 grams. Therefore, 0.0345 kg multiplied by 1,000 equals 34.5 grams. Choices A, C, and D are incorrect because they do not correctly convert kilograms to grams. A states 3.45 grams, which is off by a factor of 10. C and D overestimate the conversion by considering the decimal point in the original value as a whole number. Hence, the correct answer is B, 34.5 grams.
4. How many milliliters are in a tablespoon?
- A. 10 ml
- B. 15 ml
- C. 5 ml
- D. 20 ml
Correct answer: B
Rationale: The correct answer is B: 15 ml. One tablespoon is equivalent to 15 milliliters. The conversion factor for tablespoons to milliliters is 1 tablespoon = 15 milliliters. Choice A (10 ml) is incorrect because it is not the standard conversion for a tablespoon. Choice C (5 ml) is incorrect as it is too low for a tablespoon. Choice D (20 ml) is incorrect as it is too high for a tablespoon. Therefore, the correct conversion is 15 milliliters for one tablespoon.
5. How many meters are equivalent to 3 kilometers?
- A. 300 meters
- B. 3,000 meters
- C. 30,000 meters
- D. 300,000 meters
Correct answer: B
Rationale: To convert from kilometers to meters, you need to multiply by 1,000 since there are 1,000 meters in a kilometer. Therefore, 3 kilometers is equal to 3,000 meters. Choices A, C, and D are incorrect because they do not correctly convert kilometers to meters.
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