Nursing Metric Conversions

Correct Answer: B

Rationale: The correct answer is B: 1000 grams. This is because there are 1000 grams in one kilogram. The prefix "kilo-" signifies 1000 in the metric system. Therefore, when converting from kilograms to grams, we multiply by 1000. The other choices are incorrect because A (100 grams) is the conversion from decagrams to grams, C (500 grams) is not the correct conversion from kilograms, and D (2000 grams) is the equivalent of 2 kilograms, not 1 kilogram. Thus, B is the correct answer.

Correct Answer: B

Rationale: To convert centimeters to kilometers, we need to divide by 100,000 (since 1 kilometer = 100,000 centimeters). For 345 cm, the correct calculation is 345 / 100,000 = 0.00345 km. The correct answer is B (0.0345 km) because of a common error in decimal placement. Option A is incorrect as it has an extra zero. Option C is incorrect as it is off by a factor of 10. Option D is incorrect as it is off by a factor of 100.

Correct Answer: B

Rationale: To convert liters to milliliters, you need to multiply by 1000 since there are 1000 milliliters in 1 liter. Therefore, 0.5 liters x 1000 = 500 milliliters. So, the correct answer is B: 500 ml. Choice A (50 ml) is incorrect as it is the result of multiplying by 10 instead of 1000. Choice C (5 ml) is incorrect as it is the result of dividing by 10 instead of multiplying by 1000. Choice D (0.5 ml) is incorrect as it represents the original amount in milliliters instead of the converted value.

Correct Answer: A

Rationale: To simplify the ratio 0.004, we need to express it in the form of a ratio of integers. First, multiply by 1000 to get 4. So, the ratio becomes 4:1000. Further simplifying by dividing both terms by 4 gives us 1:250, which is the correct answer (A). Choices B, C, and D are incorrect because they do not represent the simplified ratio of 0.004. B, C, and D do not result from the correct calculation process and do not simplify to the equivalent ratio of 1:250.

Correct Answer: B

Rationale: To convert grams to milligrams, you need to multiply by 1,000 since 1 gram is equal to 1,000 milligrams. Therefore, to convert 3,450 grams to milligrams, you multiply 3,450 by 1,000, which equals 3,450,000 mg. The correct answer is B. Explanation for other choices: A: 34,500 mg - This is incorrect as it only multiplies by 10 (not 1,000). C: 3,450 mg - This is incorrect as it does not convert grams to milligrams. D: 3,450,000 mg - This is incorrect as it repeats the original value in milligrams.