Metric Conversions for TEAS 7

Correct Answer: B

Rationale: To convert yards to feet, we use the fact that 1 yard is equal to 3 feet. This is because 1 yard is defined as 3 feet. Therefore, the correct answer is B: 3 feet. Explanation for other choices: A: 4 feet - Incorrect because 1 yard is equal to 3 feet, not 4 feet. C: 2 feet - Incorrect because 1 yard is equal to 3 feet, not 2 feet. D: 5 feet - Incorrect because 1 yard is equal to 3 feet, not 5 feet.

Correct Answer: A

Rationale: To calculate 0.5 multiplied by 20, you simply multiply 0.5 by 20, which equals 10. The correct answer is A (10). The other choices are incorrect because: B (15) is the result of 0.5 multiplied by 30. C (20) is the original number being multiplied, not the result. D (25) is the result of 0.5 multiplied by 50, not 20.

Correct Answer: C

Rationale: The correct answer is C: 1,000 grams. There are 1,000 grams in 1 kilogram because the prefix "kilo-" in the metric system signifies 1,000. Therefore, 1 kilogram equals 1,000 grams. Choice A (10 grams) is incorrect because it is not equivalent to a kilogram. Choice B (100 grams) is incorrect as well, as it is also not the correct conversion. Choice D (10,000 grams) is incorrect because it is ten times the amount in a kilogram.

Correct Answer: A

Rationale: To convert 0.75 to a fraction, we write it as 75/100 and simplify to 3/4 by dividing both numerator and denominator by the greatest common divisor, which is 25. Choice A (3/4) is correct as it represents 0.75 in simplest form. Choices B, C, and D are incorrect because they do not equal 0.75 when converted to a fraction. Choice B (7/10) simplifies to 0.7, choice C (15/20) simplifies to 0.75 but is not in simplest form, and choice D (1/2) simplifies to 0.5.

Correct Answer: A

Rationale: To convert mg to mcg, you need to multiply by 1000. Therefore, 0.025 mg x 1000 = 25 mcg. The correct answer is A (25 mcg). Choice B (250 mcg) is incorrect as it incorrectly multiplies by 10 instead of 1000. Choice C (2.5 mcg) is incorrect as it drops a zero from the conversion. Choice D (0.25 mcg) is incorrect as it adds an extra zero to the answer.