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Math Help - Addition

  1. #1
    Senior Member
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    Addition

    Here's a question I've come across and I am stuck...

    The questions goes like this (even though there are no six in the question which puzzles me)

    Replace as many of the digits 5, 6, 7, 8 with a zero as are necessary to make this addition correct.

    555
    777
    888
    999+
    ___

    1111

    This is my attempt. I guess, 9 cannot be made zeros, (as question doesn't mention it) so I did this but it's not correct.

    005
    007
    000
    999+
    ___

    1111

    Any help would be very much appreciated... Thanks
    Last edited by Natasha1; November 8th 2013 at 11:06 PM.
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  2. #2
    MHF Contributor
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    Re: Addition

    Hey Natasha1.

    Can you replace anything with a zero? If so why is your answer wrong?
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  3. #3
    Senior Member
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    Re: Addition

    Because it does not make 1111 what I did.

    The question is this Replace as many of the digits 5, 6, 7, 8 with a zero as are necessary to make this addition correct. (but what I don't get is that there are no 6 in the addition given and we are not told we are allowed to touch the 9)

    So I am stuck...
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  4. #4
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    Re: Addition

    Sorry: for some reason I thought it was OK (just having a bad day).

    Try this:

    055
    077
    880
    099
    ___
    1111
    Thanks from Natasha1
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  5. #5
    Senior Member
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    Re: Addition

    Assuming we are allowed to change a 9, which is not mentioned in the question then that would work. Thanks for your help!
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