Basic Mathematics Symbols

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Across
  1. 3. 3+5=-2 and 8
  2. 4. plus sign
  3. 7. obelus
  4. 9. 2 × (3+5) = 16
  5. 12. minus sign
  6. 14. multiplication
  7. 18. 1ppm = 1/1000000
  8. 19. per-trillion
  9. 20. remainder calculation.
Down
  1. 1. 10ppb × 30 = 3×10-7
  2. 2. 358 and -2n
  3. 5. refers to multiplication.
  4. 6. [(1+2)×(1+5)] = 18
  5. 8. 5 is not equal to 4
  6. 10. 5=2 5 = 2+3 5 is equal to 2+3
  7. 11. represent exponent.
  8. 13. approximately equal
  9. 15. 2.3=6
  10. 16. a number or ratio that can be expressed as a fraction of 100.
  11. 17. decimal point, decimal separator.
  12. 18. 1% = 1/1000=0.1%