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Averages and Rounding Practice Questions Flashcards

6 cards from real PARCC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Averages and Rounding Practice Questions flashcards as text

  1. What is the median of the data set: 5, 12, 3, 9, 7, 15, 1?

    Answer: 7

    Arrange in order: 1, 3, 5, 7, 9, 12, 15. The median is the middle value (4th of 7): 7.

  2. Round 0.00549 to the nearest thousandth.

    Answer: 0.005

    The thousandths digit is 5. The digit to the right (ten-thousandths) is 4, which is < 5, so keep the thousandths digit: 0.005.

  3. Six friends earned the following amounts babysitting: $15, $22, $18, $30, $12, and $25. What is the mean amount earned?

    Answer: $20.33

    Sum: 15 + 22 + 18 + 30 + 12 + 25 = 122. Mean: 122 ÷ 6 ≈ $20.33.

  4. What is 4,836 rounded to the nearest hundred?

    Answer: 4,800

    The hundreds digit is 8. The tens digit is 3, which is < 5, so round down: 4,800.

  5. A data set has a mean of 45. If a new value of 75 is added, which of the following best describes the effect on the mean?

    Answer: The mean will increase.

    Adding a value of 75, which is greater than the current mean of 45, will pull the mean upward, so the mean will increase.

  6. Estimate the sum of 387 + 512 + 248 by rounding each number to the nearest hundred.

    Answer: 1,100

    387 rounds to 400, 512 rounds to 500, 248 rounds to 200. Estimated sum: 400 + 500 + 200 = 1,100.