Integers Crossword

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Across
  1. 3. 3+7=
  2. 4. -3+(-6)=
  3. 7. -20-(-5)=
  4. 9. -6-(-2)=
  5. 10. -4-7=
  6. 11. -3+11=
Down
  1. 1. 4+3=
  2. 2. 8+5=
  3. 3. 0+1=
  4. 5. -5+(-7)=
  5. 6. 1+1=
  6. 7. -1-2=
  7. 8. 7+3+10=
  8. 9. 6-12=
  9. 10. -10+5=