Ответ:\(7.59+4.3=7.59+4.30=11.89\).\(19.4-13.54=19.40-13.54=5.86\).\(9.04-5.7=9.04-5.70=3.34\).\(4.56:3.2=45.6:32=1.425\).Ответ: а) 11,89; б) 5,86; в) 3,34; г) 1,425.