1.89/0.54+24/0.25=1.89÷0.9÷6+24÷0.5÷0.5=2.1÷6+48÷0.5=0.35+96=96.35 7.14/3.5*3.6=(7+0.14)/3.5*(3.5+0.1)=7.14+(7+0.14)/(7*0.5*0.1)=7.14+20+0.4=27.5417.68/5.2+2.05*4.6=17(1+0.04)/(1.3*4)+(2+0.05)*4...