Missing Operator Add Sub Medium — Set 54

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medium Set 54
  1. 4 __ 9 = 36
  2. 32 __ 20 = 12
  3. 23 ○ 2 = 21, what is ○?
  4. 24 ○ 29 = 53, what is ○?
  5. 34 ○ 3 = 31, what is ○?
  6. 48 ○ 27 = 21, what is ○?
  7. 40 ○ 35 = 75, what is ○?
  8. 42 ○ 4 = 46, what is ○?
  9. 88 ○ 8 = 11, what is ○?
  10. 77 __ 7 = 11
  11. 4 ○ 12 = 48, what is ○?
  12. 33 __ 14 = 47
  13. 24 __ 4 = 6
  14. 11 __ 12 = 132
  15. 3 __ 11 = 33
  16. 34 __ 1 = 33
  17. 21 ○ 2 = 19, what is ○?
  18. 24 ○ 3 = 8, what is ○?
  19. 96 __ 12 = 8
  20. 42 ○ 1 = 43, what is ○?

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