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math 4th grade

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adding and subtracting mixed numbers in lowest terms; 5 1/2 - 2 4/5, I got as far as 3 46/10 but don't know how to break it down into lowest term.

  • math 4th grade - ,

    Here is how I would do this:

    5 1/2 - 2 4/5
    = 11/2 - 14/5 , (mixed numbers are useless in calculations)
    = 55/10 - 28/10
    = 27/10 or 2 7/10

    I have no idea how you can come up with 3 46/10 ??

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