MATH HELP FAST!!?!?!?

1. 15/16 + 1/6? 2. 5 and 2/11 - 3 and 2/18? 3. 8 and 2/17 * 1 and 15/17? 4. 2/9 + 4/9? 5. -5/6 + 4/18? 6. 11 and 5/9 + 10 and 1/3? 7. -1/5 + (-3/7)? 8. 4/9 - 1/3? 9. -5 and 2/7 - 1 and 5/7? 10. 5 and 2/3 - 4 and 5/9? 11. 2/4 - 3/6? 12. 3/5 of 50? 13. 14 * 3/5? 14. 3/10 * 2/10? 15. -4 and 1/3 * 1 and 3/5? 16. 2 and 1/7 * 3/4? 17. 6/7 divided by 1/4? 18. -4/3 + -11/7? 19. 8 / 5/9? 20. -5 and 4/6 / 2 and 1/5? Thanks :).