math 4th grade
posted by Jared .
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.

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 ??