A. Basic Math Symbol

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Across
  1. 2. ×
  2. 4. exponent
  3. 7. >
  4. 9. calculate expression inside first
  5. 11. ÷
  6. 13. equal sign
  7. 15. <
  8. 17. minus sign represent
  9. 19. ppt
  10. 20. remainder calculation
Down
  1. 1. -
  2. 3. ≠
  3. 5. ppb
  4. 6. ppm
  5. 8. indicates a number or ratio as fraction of 100
  6. 10. both minus and plus operation
  7. 12. both plus and minus operation
  8. 14. +
  9. 16. decimal point, decimal separator
  10. 18. one of multiplication symbol