а)0.25*0.3*4 = 0.3
б)0.2*0.13*50=1.3
в)0.8*0.11*1.25=0.11
г)0.125*3*0.8=0.3
е)0.25*1.7*1.6=0.68
д)0.5*7.3*2.2=8.03