BASIC MATH SYMBOLS

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Across
  1. 3. decimal point, decimal separator
  2. 5. ppt
  3. 7. root √a
  4. 8. exponent
  5. 9. ppm
  6. 13. sign =
  7. 14. root 3√a
  8. 16. inequality less than
  9. 18. ppb
Down
  1. 1. []
  2. 2. less than or equal
  3. 3. 1%=1/100
  4. 4. remainder calculation
  5. 6. *
  6. 8. ()
  7. 10. equal sign ≠
  8. 11. root 4√a
  9. 12. ‰
  10. 15. sign ×
  11. 17. sign +