Crossword Puzzle 1 Basic Math Symbols

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Across
  1. 4. √a ⋅ √a = a
  2. 8. equality(=)
  3. 9. calculate expression inside first ([])
  4. 10. 4√a ⋅ 4√a ⋅ 4√a ⋅ 4√a = a (4√a)
  5. 13. decimal point, decimal separator
  6. 14. multiplication (X)
  7. 16. division (/)
  8. 18. calculate expression inside first()
  9. 19. 1ppt = 10-12
Down
  1. 1. division (÷)
  2. 2. remainder calculation
  3. 3. 1ppb = 1/1000000000
  4. 5. %
  5. 6. exponent (a^b)
  6. 7. 3√a ⋅ 3√a ⋅ 3√a = a
  7. 11. 1‰ = 1/1000 = 0.1%
  8. 12. subtraction
  9. 13. addition(+)
  10. 15. greater than or equal to (≥)
  11. 17. multiplication (*)