Mathematics

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Across
  1. 3. 20-19=
  2. 4. 9-5=
  3. 6. 7-2=
  4. 7. 2×8=
  5. 10. 3×3=
  6. 11. 3×6=
  7. 12. 30-20=
  8. 14. 4+9=
  9. 16. 1+6=
  10. 18. 40-23=
Down
  1. 1. 7+7=
  2. 2. 1+1=
  3. 4. 3×5=
  4. 5. 7+12=
  5. 8. 4×2=
  6. 9. 5×4=
  7. 13. 12×1=
  8. 15. 15-12=
  9. 17. 49-38=
  10. 18. 2×3=