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.

Answer 1

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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.