Ответ:

  1. \(24\cdot3=72\);
  2. \(60:20=3\);
  3. \(4\cdot17=68\);
  4. \(69:3=23\);
  5. \(72:3=24\);
  6. \(66:11=6\);
  7. \(78:26=3\);
  8. \(100:20=5\);
  9. \(56:4=14\);
  10. \(96:24=4\);
  11. \(3\cdot24=72\);
  12. \(6\cdot13=78\).