Adding, Subtracting, Multiplying, and Dividing Fractions

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Across
  1. 1. (-5/6) / (-2/3)
  2. 3. (2 4/6) + (3 2/3)
  3. 7. (4 3/4) + (12 12/21)
  4. 11. (3/4) / (-1/2)
  5. 12. (-1 7/8) * (-2 2/5)
  6. 14. (5/1) / (1 1/3)
  7. 15. (3/9) + (2/4)
  8. 16. (1/2) + (4/5)
  9. 18. (-4/5) / (8/9)
Down
  1. 2. (4 5/6) - (3 2/3)
  2. 4. (3 1/4) - (1 3/4)
  3. 5. (2 1/3) / (1/5)
  4. 6. (1/4) * (8 4/9)
  5. 8. (11 2/5) - (2 3/5)
  6. 9. (8/10) - (2/10)
  7. 10. (13 4/5) - (5 15/21)
  8. 11. (2/3) * (-1/4)
  9. 13. (3/5) * (1/2)
  10. 16. (5 14/16) + (7 8/16)
  11. 17. (-1/3) * (-3/7)