Ответ:

  1. \(47+56:14=47+4=51\);
  2. \(78+600:3=78+200=278\);
  3. \(56+420:7=56+60=116\);
  4. \(184+72:9=184+8=192\);
  5. \(790-400:2=790-200=590\);
  6. \(16\cdot(60:10)=16\cdot6=96\);
  7. \(840:2:6=420:6=70\);
  8. \(980:2+720:8=490+90=580\);
  9. \(23\cdot(80:40)=23\cdot2=46\).

Ответ: 51; 278; 116; 192; 590; 96; 70; 580; 46.