Ответ:\(51+8=59\).\(46+4=50\).\(67+7=74\).\(67-6=61\).\(80-5=75\).\(73-4=69\).\(35-(12-7)=35-5=30\).\(14-6+80=8+80=88\).\(40+20-6=60-6=54\).Ответ: 59; 50; 74; 61; 75; 69; 30; 88; 54.