Addition and subtraction

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Across
  1. 3. _______+11=79
  2. 5. adding 7 two times
  3. 7. 16+12
  4. 8. subtracting 7 one times
  5. 11. five adding 5 five times
  6. 12. adding 2 two times
  7. 13. adding 10 ten times
Down
  1. 1. adding 9 two times
  2. 2. 14-12
  3. 4. subtracting 44 two times
  4. 6. 12+5
  5. 9. adding 40 two times
  6. 10. 27-3
  7. 11. 10+3