Crossword time! :)

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Across
  1. 5. Rational numbers are always in ______ form
  2. 6. One or more results of an experiment is an ______
  3. 9. the expression on the left hand side of the equality sign is
Down
  1. 1. the difference between the upper class limit and lower class limit of a class interval is called _____
  2. 2. subract the smallest value from the largest value is called _____
  3. 3. The numbers 0, and all the Natural numbers are known as ____
  4. 4. _____ is the letter that replaces the digit
  5. 7. The numbers 1,2,3,4,..... are known as ____ numbers
  6. 8. 502*S*A can also be written as