HESI A2 Math Practice

Correct Answer: A

Rationale: To subtract mixed numbers, convert them to improper fractions: 6 1/2 = 13/2 and 2 2/3 = 8/3. Next, find a common denominator, which is 6. Subtract the fractions: 13/2 - 8/3 = 39/6 - 16/6 = 23/6. Convert the result back to a mixed number: 23/6 = 3 5/6, which is the correct answer (C). The other choices are incorrect because they do not match the result of the subtraction calculation.

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: C

Rationale: To find the total words typed in 20 minutes, multiply the typing speed (45 words/minute) by the duration (20 minutes): 45 words/minute * 20 minutes = 900 words. The correct answer is C (900 words) because it accurately calculates the total words typed in 20 minutes. Choices A, B, and D are incorrect as they do not accurately reflect the multiplication of typing speed and duration.

Correct Answer: C

Rationale: To find the area of a circle, we use the formula A = πr^2. Given that the diameter is 6cm, the radius (r) is half of the diameter, which is 3cm. Plugging this into the formula, we get A = π(3)^2 = 9π cm^2. Therefore, the correct answer is C: 27π cm^2. Choices A, B, and D are incorrect because they do not correctly calculate the area based on the given diameter.

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.