HESI A2 Math Practice

Correct Answer: A

Rationale: To convert kilograms to grams, we need to multiply by 1000 because there are 1000 grams in a kilogram. Therefore, 7 kilograms x 1000 = 7000 grams. Choice A is correct. Choices B, C, and D are incorrect because they do not correctly convert kilograms to grams. B is too small, C is one decimal place off, and D is too large.

Correct Answer: C

Rationale: To convert 2/5 to a decimal, divide the numerator (2) by the denominator (5). 2 ÷ 5 = 0.4 Therefore, the correct answer is C: 0.4. Choice A (0.5) is incorrect as it represents 1/2. Choice B (0.25) is incorrect as it represents 1/4. Choice D (0.5) is a duplicate of choice A and is also incorrect.

Correct Answer: A

Rationale: To convert quarts to ounces, we know that 1 quart equals 32 ounces. To find the number of ounces in 3 5/8 quarts, we multiply 3 by 32 (96 oz) and add 5/8 of 32 (16 oz). Therefore, 3 5/8 quarts equals 96 + 16 = 112 ounces. The correct answer is 184 oz, which is obtained by multiplying 3 5/8 quarts by 32 (quarts to ounces conversion factor). Other choices are incorrect because they do not correctly apply the conversion factor from quarts to ounces or use incorrect calculations.

Correct Answer: D

Rationale: To subtract 8.4 from 3.7, we perform 3.7 - 8.4. First, subtract the whole numbers: 3 - 8 = -5. Then subtract the decimals: 0.7 - 0.4 = 0.3. Combine the results to get -5.3. Therefore, the correct answer is option D: 4.7. Option A (4.5) is the result of subtracting the whole numbers but not the decimals. Option B (4.8) and Option C (4.6) are incorrect as they do not result from the correct subtraction calculation.

Correct Answer: A

Rationale: To convert 3 quarts to liters, we use the conversion factor 1 quart = 0.946 liters. So, 3 quarts x 0.946 = 2.838 liters, which is rounded to 2.8 liters. Therefore, the correct answer is A (2.8 liters). Option B (3.5 liters) is incorrect as it's not the accurate conversion. Option C (2.5 liters) is lower than the accurate conversion. Option D (4.0 liters) is higher than the accurate conversion.