Basic Math Symbols

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Across
  1. 1. Root √
  2. 4. Than or Equal To ≤
  3. 6. Than >
  4. 7. =
  5. 9. ∏
  6. 11. ^
  7. 12. an Element of ∉
  8. 13. π
  9. 14. Equal ≠
  10. 16. +
  11. 18. %
  12. 19. ∑
Down
  1. 2. Value | |
  2. 3. Than <
  3. 5. −
  4. 6. Than or Equal To ≥
  5. 8. ×
  6. 10. ÷
  7. 15. !
  8. 17. of ∈