Math Crossword Puzzle

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Across
  1. 2. a symbol that doesnt have a fixed value
  2. 4. a method of writting numbers as the product of their factors or divisors
  3. 6. a fixed numerical value
  4. 8. are terms that have the same variables and powers
Down
  1. 1. a number that is multplied by a variable in an expression
  2. 3. the reverse of factorization
  3. 5. a ratio that compares two quantities with different units
  4. 7. can be a single constant or variable or combination of constant and variable combined with multiplication or division