Jackson's Crossword Puzzle

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Across
  1. 4. the number on top of a fraction
  2. 8. the amount of space in a certain 3D object
  3. 10. length x width
  4. 12. the order we multiply does not change the probuct
  5. 13. how multiplication is distributed over addition or subraction
  6. 15. a whole number greater than 1
Down
  1. 1. the inverse of a value or number
  2. 2. base x height / 2
  3. 3. the numerator is bigger than the denominator
  4. 5. the number on the bottom of the fraction
  5. 6. the space occupied by a two-dimensional flat surface
  6. 7. expressing large numbers in terms of powers
  7. 9. the smallest multiple of two or more numbers
  8. 11. the largest factor that all the numbers share
  9. 14. the ratio of two different units with denominator as 1