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Lucinda has three packages of baseball cards. The first package has thirteen cards. The second package has twenty-six cards, and the third package has twenty-two cards. Using front end estimation, what is the best estimate for the total number of baseball cards she has? A. 30 B. 40 C. 50 D. 60

Question

Lucinda has three packages of baseball cards. The first package has thirteen cards. The second package has twenty-six cards, and the third package has twenty-two cards. Using front end estimation, what is the best estimate for the total number of baseball cards she has? A. 30 B. 40 C. 50 D. 60

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Solution

Front end estimation is a method of estimating that involves rounding off numbers to their highest place value and then adding them together.

Here's how you can use front end estimation to solve this problem:

  1. Round off the number of cards in each package to the nearest ten.

    • The first package has 13 cards, which rounds off to 10.
    • The second package has 26 cards, which rounds off to 30.
    • The third package has 22 cards, which rounds off to 20.

  2. Add the rounded off numbers together.

    • 10 (from the first package) + 30 (from the second package) + 20 (from the third package) = 60

So, the best estimate for the total number of baseball cards Lucinda has, using front end estimation, is 60 (Option D).

This problem has been solved

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