Pre-Algebra Crossword Puzzle

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Across
  1. 4. The opposite of multiplication
  2. 5. "Per hundred"; A fraction whose denominator is 100
  3. 8. The opposite of addition
  4. 9. This represents how many times a number is multiplied by itself
  5. 10. The number property in which the outer number is multiplied by both numbers within a set of parentheses
  6. 12. The top number of a fraction
  7. 13. The number property in which the grouping of numbers does not matter
Down
  1. 1. The number property in which the value of the original number remains unchanged
  2. 2. The number property in which the order of numbers does not matter
  3. 3. Letters in math are called
  4. 6. The end result of a multiplication problem is called
  5. 7. The bottom number of a fraction
  6. 11. The end result of an addition problem is called