Ответ:

  1. 7 × 20 = 140
  2. 12 × 10 = 120
  3. 10 × 20 = 200
  4. 9 × 10 = 90
  5. 6 × 50 = 300
  6. 8 × 10 = 80
  7. 15 × 20 = 300
  8. 14 × 20 = 280
  9. 13 × 30 = 390
  10. 11 × 5 = 55
  11. 5 × 70 = 350
  12. 16 × 25 = 400
  13. 18 × 40 = 720
  14. 20 × 10 = 200
  15. 9 × 30 = 270