Math Crossword puzzle

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Across
  1. 3. a shape
  2. 4. to add
  3. 8. A problem
  4. 9. to times a number
  5. 10. It's just like a percentage
Down
  1. 1. the end of an equation
  2. 2. It's not a whole number
  3. 5. A dot that is between a whole number
  4. 6. to take away
  5. 7. to divide