Pre-Algebra Vocab

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Across
  1. 4. same order of numbers
  2. 6. reduce to a basic form
  3. 8. the act of adding
  4. 9. mathematical line without an equal sign
Down
  1. 1. expression with an equal sign
  2. 2. changes order of numbers
  3. 3. simplify
  4. 5. find an answer to
  5. 7. a letter that holds the place of a number