Basic Math Symbols

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Across
  1. 3. It's symbol is "[]" and it means to solve the expression inside first
  2. 4. 1ppt = 10-12
  3. 5. It's symbol is "*" and it represents multiplication
  4. 8. It's symbol is "∑" and it's the sum of all values in range of series
  5. 9. 1% = 1/100
  6. 11. 1ppm = 1/1000000
  7. 12. 3√a ⋅ 3√a ⋅ 3√a = a
  8. 13. 4√a ⋅ 4√a ⋅ 4√a ⋅ 4√a = a
  9. 14. It's symbol is "÷" and it represents division
  10. 16. The most common symbol used for division
  11. 17. It's symbol is "φ" and it's approximately equivalent to 1.618
  12. 18. It's symbol is "≠" and it represents inequality
Down
  1. 1. It's symbol is "π" and it's approximately equivalent to 3.14
  2. 2. 1‰ = 1/1000 = 0.1%
  3. 4. It's symbol is "+" and it represents addition
  4. 6. √a ⋅ √a = a
  5. 7. It's symbol is "^" and it represents an exponent
  6. 10. It's symbol is "=" and it represents equality
  7. 11. 1ppb = 1/1000000000
  8. 15. It's symbol is "−" and it represents subtraction