Missing Operator Add Sub Medium — Set 57

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medium Set 57
  1. 56 __ 7 = 8
  2. 24 ○ 8 = 3, what is ○?
  3. 19 ○ 8 = 11, what is ○?
  4. 63 __ 7 = 9
  5. 34 __ 24 = 10
  6. 8 __ 5 = 40
  7. 22 ○ 2 = 11, what is ○?
  8. 7 ○ 9 = 63, what is ○?
  9. 42 ○ 46 = 88, what is ○?
  10. 4 __ 3 = 12
  11. 10 __ 11 = 110
  12. 10 __ 12 = 120
  13. 81 ○ 9 = 9, what is ○?
  14. 10 ○ 32 = 42, what is ○?
  15. 15 __ 5 = 3
  16. 9 ○ 8 = 72, what is ○?
  17. 5 ○ 7 = 35, what is ○?
  18. 48 ○ 19 = 67, what is ○?
  19. 86 ○ 50 = 36, what is ○?
  20. 60 ○ 12 = 5, what is ○?

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