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What is the result of the subtraction 27 - 3.54?
- A. 24.46
- B. 23.46
- C. 33.3
- D. 24.54
Correct Answer: B
Rationale: To subtract 3.54 from 27, align the decimal points and subtract as you would with whole numbers. 27 - 3.54 equals 23.46. Therefore, the correct answer is 23.46, corresponding to option B. Remember to be careful with decimal point placement and borrow if necessary when subtracting decimals.
You may also like to solve these questions
What is the result of dividing 18.104 by 0.002?
- A. 9052
- B. 0.09052
- C. 9.052
- D. 9.52
Correct Answer: A
Rationale: When dividing by a small decimal like 0.002, it's equivalent to multiplying by 500 (since 1 · 0.002 = 500). Thus, 18.104 — 500 = 9052. This process involves shifting the decimal point three places to the right to calculate the answer.
Ratio and Proportion: 3 : 10 :: 12 : X
- A. X = 3.6
- B. X = 40
- C. X = 0.27
- D. X = 2.5
Correct Answer: B
Rationale: To solve this proportion, set up the equation: 3/10 = 12/X. Cross-multiply to get 3X = 120. Dividing both sides by 3 gives X = 40. Therefore, the correct answer is B. X equals 40 to maintain the proportional relationship. The ratio 3:10 is equivalent to the ratio 12:40, hence X equals 40.
Ratio and Proportion: 9 : X :: 5 : 300 (Enter numeric value only.)
- A. 450
- B. 540
- C. 600
- D. 480
Correct Answer: B
Rationale: To find the value of X in the proportion 9 : X :: 5 : 300, we can set up the equation (9/X) = (5/300) and cross-multiply. This gives us 9 * 300 = 5 * X. Simplifying further, we get X = (9 * 300) / 5 = 540. Therefore, the correct answer is 540, which is option B.
What is the result of multiplying 375 by 2.3?
- A. 862.5
- B. 750
- C. 225.75
- D. 1125
Correct Answer: A
Rationale: To find the result of multiplying 375 by 2.3, you need to multiply the two numbers together. Multiplying 375 by 2.3 is calculated as 375 x 2.3 = 862.5. Therefore, the correct answer is A, which is 862.5.
Convert 3/5 to a decimal.
- A. 0.06
- B. 0.6
- C. 3.5
- D. 1.6
Correct Answer: B
Rationale: To convert a fraction to a decimal, you divide the numerator by the denominator. In this case, 3 · 5 = 0.6. Therefore, the correct answer is B) 0.6.