Ответ:

  1. \(34\cdot100=3400\);
  2. \(1000\cdot750=750000\);
  3. \(300\cdot10000=3000000\);
  4. \(9000\cdot6=54000\);
  5. \(400\cdot80=32000\);
  6. \(50\cdot17000=850000\).