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Math Help - subtraction

  1. #1
    Junior Member
    Joined
    Apr 2008
    Posts
    39

    subtraction

    Allie solves the subtration problem 304-9 as follows

    2 14
    304
    _ 9
    _____
    205

    Explain to Allie what is wrong with her method, and explain why the correct method makes sense.

    Thank you
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  2. #2
    Newbie
    Joined
    Feb 2008
    Posts
    6
    2 9 1
    3 0 4
    - 9
    2 9 5


    You can't take anything away from the zero, so you have to cross out the 3, write in 2, then you have 10, cross that 10 out and you write 9 and then you have 14 from which you take away 9 and carry the rest down, does that make sense?
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