Algebra Crossword - write any numbers as words (e.g. write "2" as "two")

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Across
  1. 2. The answer from an addition operation
  2. 3. The distance around a circle
  3. 5. A letter or symbol to represent an unknown number
  4. 7. The answer from a division operation
  5. 8. Solve for x: x+9=12
  6. 10. Evaluate (9/m)+4 when m=3
Down
  1. 1. What the "M" in PEMDAS stands for
  2. 4. The answer from a multiplication operation
  3. 6. Solve for x: x+3=8
  4. 9. Evaluate a+4 when a=7 (write the answer as a word)
  5. 10. Use the order of operations to simplify: 12-2•3