Math Puzzle

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Across
  1. 2. A number written using a point, such as (3.14).
  2. 4. 3.14159
  3. 6. the difference of
  4. 8. the sum of
  5. 9. A round shape
Down
  1. 1. A number that represents a part of a whole,1/2.
  2. 3. The result of dividing numbers
  3. 5. one line with a dot above and under it.
  4. 7. A whole number, positive or negative