Math Crossword puzzle

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Across
  1. 2. when a pair of numbers are equal to 0 (4-4)
  2. 4. of a fraction is the two numbers switched, or for example, the reciprocal of 5 is 5/1. (⅔ = 3/2)
  3. 8. The operation that undoes what was done by the previous operation
  4. 9. every number from 1 to beyond. (1, 2, 3,)
  5. 10. makes every number negative that is in parentheses. (-(5x+3)=-5x-3)
  6. 11. makes a question more simple
  7. 13. When any number could be the answer
  8. 15. is another way of writing a decimal.
  9. 16. when a factor is multiplied by the sum/addition of two terms, it is essential to multiply each of the two numbers by the factor, and finally perform the addition operation.
  10. 17. is any number that can be written as a fraction, where both the numerator and denominator are integers, and the denominator is not equal to zero.
  11. 18. what you have to solve
  12. 20. are rules or series of properties
  13. 21. Any mathematical statement which consists of numbers, variables and an arithmetic operation between them.
  14. 22. when a problem is not possible
  15. 24. are rational and irrational numbers.
  16. 25. A positive or Negative Whole Number (-5, -6)
Down
  1. 1. point is the point where you make 0 profit when you spend money on something.
  2. 3. point in a number, another way to write a fraction
  3. 5. has only one answer
  4. 6. is a real number, that is repeating
  5. 7. Two or more numbers share properties (2x+7x, 2+6)
  6. 12. when a letter represents a number
  7. 14. answer to the problem
  8. 19. A positive and non negative number (0, 1, 2,)
  9. 23. a single number