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Coin Counting

by Dan Meyer


Act One

  • Dan Meyer

    Dan Meyer

    October 16, 2014

    How much cash is that? How many coins are there?

  • 1.

    Write a wrong answer for both questions.

  • 2.

    Write your best guess for both questions.

Act Two

  • Teacher note
    Here's the plan. Release a single piece of information, then ask them to figure out possible solutions. Then release the next piece of information. Ask them to figure out possible solutions.

    This may involve a lot of guessing and checking.

    If so, you should feel free to step in and show them how mathematicians solve similar problems quickly, with no guess-and-checking at all.

    Fact #1: The cash is worth $62.00.

    Fact #2: There are 1,400 coins.

Act Three


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