Jackson's Crossword Puzzle

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