PEMDAS Crossword!!

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Across
  1. 4. A shortcut for subtraction
  2. 6. A shortcut for addition
  3. 7. To take something away
  4. 9. Two things are equal to each other
  5. 10. Does not change
  6. 12. Sets terms apart
Down
  1. 1. To put things together
  2. 2. To determine if something is true
  3. 3. The answer to a problem
  4. 5. To show something is right
  5. 8. Can change
  6. 11. A polygon with three sides
  7. 13. How many times you multiply something by itself