Ответ:
- \(70+5\times(12-8)=70+5\times4=90\).
- \(600:3-800:4=200-200=0\).
- \(120:6+60\times3=20+180=200\).
- \(800+24:6=800+4=804\).
- \(50-4\times(12-5)=50-4\times7=22\).
- \(90\times6-60\times9=540-540=0\).
- \(790+70=860\).
- \(620-50=570\).
- \(900-260=640\).
- \(340+150=490\).
- \(560:80=7\).
- \(900:30=30\).
- \(420:6=70\).
