Solve.
7/8 – (1/4 + 1/2)
7/10 – (2/5 + 1/10)
7/8 – 1/4 + (1/2 – 1/8)
3/10 + 3/5 – 1/2
2/3 – 1/4 + 1/6
9/10 – (3/8 + 1/4)
1/3 + (8/9 – 5/6)
5/6 – 1/4 + 2/3
1/3 + (1/4 – 1/8)
85/100 – 3/10 + 1/5