1. 2/3 - 1/4=
2. 2/5 + 1/4=
3. 5/8 - 1/2=
4. 6/10 + 2/5=
5. 1/3 + 2/8=
6. 3/5 + 2/4=
7. 2/3 + 1/6=
8. 1 2/5 + 1 1/4=
9. 1 1/3 + 2 1/6=
10. 5 1/2 + 2 1/7=
11. 19/25 - 12/25​