Posted by jazzi on .
Solve: 5 1/81 7/8

pre algebra 
Steve,
5 1/8 = 4 9/8
1 7/8 = 1 7/8
subtract to get 3 2/8 = 3 1/4
Not sure I'd call this prealgebra; just 4th grade math to me. Still, I guess all arithmetic is prealgebra.