Ответ:\(760-(120+80)+60=760-200+60=560+60=620\).\(500-(270+130)-1=500-400-1=100-1=99\).\(720:(60:6):2=720:10:2=72:2=36\).\(90:(45:9):2=90:5:2=18:2=9\).\(374:2=187\).\(186:3=62\).Ответ: 620; 99; 36; 9; 187; 62.