Math Choice Board Crossword Puzzle

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Across
  1. 3. The answer you get from equations
  2. 6. The opposite of Divison
  3. 7. The opposite of subtraction
  4. 8. A letter on top of a number
Down
  1. 1. The opposite of Addition
  2. 2. The opposite of Multiplication
  3. 4. A formula
  4. 5. A letter