Missing Operator Add Sub Medium — Set 52

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medium Set 52
  1. 46 __ 36 = 82
  2. 50 ○ 5 = 10, what is ○?
  3. 40 ○ 5 = 8, what is ○?
  4. 19 __ 18 = 1
  5. 12 __ 26 = 38
  6. 89 ○ 40 = 49, what is ○?
  7. 2 ○ 11 = 22, what is ○?
  8. 28 ○ 7 = 4, what is ○?
  9. 121 __ 11 = 11
  10. 40 ○ 10 = 4, what is ○?
  11. 18 __ 15 = 3
  12. 15 ○ 3 = 5, what is ○?
  13. 23 __ 24 = 47
  14. 54 ○ 49 = 5, what is ○?
  15. 48 ○ 18 = 30, what is ○?
  16. 8 __ 11 = 88
  17. 10 ○ 39 = 49, what is ○?
  18. 33 ○ 45 = 78, what is ○?
  19. 12 __ 12 = 144
  20. 5 __ 8 = 40

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