project for math

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Across
  1. 3. opposite of multiply
  2. 6. when you use -
  3. 7. cant be decimal or fraction unless simplifies to 1
  4. 8. opposite of negative
Down
  1. 1. opposite of positive
  2. 2. when you use +
  3. 4. name of what you do when you use x
  4. 5. another word for 1