Basic Math Symbols

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Across
  1. 4. asterisk
  2. 7. =
  3. 8. remainder calculation
  4. 10. ppm
  5. 11. ppt
  6. 13. %
  7. 15. decimal point
  8. 16. ()
  9. 18. both minus and plus operations
  10. 20. horizontal line
  11. 21. exponent
Down
  1. 1. []
  2. 2. plus sign
  3. 3. obelus
  4. 5. ppb
  5. 6. both minus and plus operations
  6. 9. strict inequality
  7. 12. approximately equal
  8. 14. not equal sign
  9. 17. minus sign
  10. 19. a^b