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math

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ian multiplied a number by 5. he then multiplied that product by 2. what digit is in the ones place of the final product?

  • math -

    so he multiplied something by 5 and then by 2.
    Mmmmhhh, didn't he in effect multiply by 10 ??

    What happens when you multiply something by 10 ?

  • math -

    10

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