1.6x2.8二4.48在有4种列式方算它的得数还是4.481.6*2.8=1.6*(3-0.2)=1.6*3-1.6*0.2=4.8-0.32=4.481.6*2.8=1.6*(2+0.8)=1.6*2+1.6*0.8=3.2+1.28=4.481.6*2.8=(2-0.4)*2.8=2*2.8-0.4*2.8=5.6-1.12=4.481.6*2.8=(1+0.6)*2.8=1*2.8+0.6*2.8=2.8+1.68=4.48