0.25*4.44
=0,25*4+0.25*0.4+0.25*0.04
=1+0.1+0.01
=1.11
0.56*1.25*3
=(0.8*1.25)*(0.7*3)
=1*2.1=2.1还有。8.88*1.25=8*1.25+0.8*1.25+0.08*1.25=10+1+0.1=11.10.98*7.4=(1-0.02)*(7.5-0.1)=1*7.5-1*0.1-0.02*7.5+0.02*0.1 =7.5-0.1-0.15+0.002 =7.252