Adding -tion to a word

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Across
  1. 3. a number sentence
  2. 4. to subtract numbers
  3. 6. to multiply numbers
  4. 9. the state something is in
  5. 10. to elect a president
Down
  1. 1. Class of 2028
  2. 2. document discussing the rules of government
  3. 5. adding numbers together
  4. 7. the part of our writing that gets the readers interest
  5. 8. add, subtract, multiply, or divide