Math vocab crossword puzzle

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Across
  1. 2. the least common multiple of a number
  2. 3. A letter that stands for an unknown number
  3. 8. the number above the line in a fraction
  4. 9. Numbers numbers that less than 0
Down
  1. 1. A number that is multiplied by a variable
  2. 4. the set of whole numbers and their opposites
  3. 5. The number that is used repeatedly
  4. 6. A routine to solve problems
  5. 7. Numbers numbers that are more than zero
  6. 10. the greatest factor of a number