Ответ:\(4,12+26,1872=30,3072\approx30,31\);\(3,2\cdot2,134=6,8288\approx6,83\);\(37,12-19,268=17,852\approx17,85\);\(9,162:3,25\approx2,8191\approx2,82\).Ответ: а) 30,31; б) 6,83; в) 17,85; г) 2,82.