Math Crossword!

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Across
  1. 3. 4x7=
  2. 4. 1/4+1/2=
  3. 5. Operation that adds
  4. 8. 89 rounded to the nearest ten
  5. 10. 5/3-3/3=
  6. 14. 66-34=
  7. 15. 325-125=
Down
  1. 1. 5x6=
  2. 2. Three hours and five minutes after 2:10
  3. 6. Two hours and fifteen minutes after 7:15
  4. 7. 532 rounded to the nearest hundred
  5. 9. 73+21=
  6. 11. 1/2-1/4=
  7. 12. About the weight of a textbook
  8. 13. About the length of a paper clip