Math Crossword Puzzle

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Across
  1. 3. 1 mile and 1 foot
  2. 7. Equal to 472/4
  3. 9. see picture
Down
  1. 1. 26+5x36/2=?
  2. 2. A Strategy for Multiplication
  3. 4. To organize something in groups one above the other to rank things according to status or authority
  4. 5. A Strategy for Division
  5. 6. Order of Operations
  6. 8. How much mass an object has