math

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Across
  1. 4. /the number obtained by division
  2. 6. /the number that remains after subtraction
  3. 9. any of numbers that form a product when multiplied together
  4. 11. the quotient of two rational numbers
  5. 12. /a quantity obtained by the addition of a group of numbers
  6. 13. an approximate calculation of quantity or degree or worth
  7. 17. natural number or its negative, or zero
  8. 18. the divisor of a fraction
  9. 20. most frequent value of a random variable
  10. 21. the product of three equal terms
Down
  1. 1. arithmetic operation of summing
  2. 2. to the middle value of an ordered set of values
  3. 3. a mathematical statement that two expressions are the same
  4. 5. space between two lines or planes that intersect
  5. 7. the dividend of a fraction
  6. 8. a quantity obtained by multiplication
  7. 10. a number that identifies a position relative to an axis
  8. 11. quantifier meaning a smaller number of
  9. 12. a polygon with four equal sides and four right angles
  10. 14. /the whole amount
  11. 15. /an arithmetic operation that is the inverse of division
  12. 16. an angle) less than 90 degrees
  13. 19. average computed by adding some function of the numbers