Emerson

I'm helping my son he is in 4th grade . His hw it's hard and this is the problem : find two mixed numbers. So that the sum is 7 2/8 and the difference 2 4/8.

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    I don't know if this answer is too advanced for 4th grade.

    Let one number = x and the other = y.

    x + y = 7 2/8

    x - y = 2 4/8

    Add the two equations to find value of x.

    2x = 9 6/8

    Divide both sides by 2.

    x = 4 7/8

    Substitute the x value in either equation to find y.

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