Mathematic Crossword

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Across
  1. 1. a more accurate number
  2. 7. a way to add, subtract, multiply, and divide positive and negative number
  3. 8. the lowest common multiple
  4. 9. the biggest common factor
  5. 11. a special of approximation when we don't have the actual value
  6. 13. a number that when multiplied with another produces a given number
  7. 15. letter that represents numbers
  8. 16. to add and subtract fraction with different denominator
  9. 17. a whole number which only has 2 different factor, 1 and the number itself
  10. 18. a whole number which is divisible by 2
  11. 19. a sequence of products using the same base number multiplied
  12. 20. to find the length or volume or height of a cube
Down
  1. 2. a whole number that has more than 2 different factors
  2. 3. to reflect the degree of accuracy
  3. 4. a way to simplify algebra, fraction, decimal, etc
  4. 5. a number that comes before zero
  5. 6. a way to expand bracketed numbers
  6. 10. a way to make an algebraic expression simpler
  7. 12. to find the area or diameter of a square
  8. 14. a whole which is not divisible by 2