3.75*4.23*36-125*0.423*2.8 知道这条题怎么简便

3.75*4.23*36-125*0.423*2.8=3.75*4.23*36-12.5*4.23*2.8=4.23(1.25*3*36-1.25*28)=4.23(1.25*4*27-1.25*4*7)=4.23(1.25*4*20)=4.23(1.25*80)=4.23*100=423

125*0.03*4.23*36-125*0.423*2.8=125*(0.03*4.23*36-0.423*2.8)=125*(4.23*1.08-4.23*0.28)=125*4.23*(1.08-0.28)=125*4.23*0.8=100*4.23=423

3.75*4.23*36-125*0.423*2.8=0.423*(37.5*36-125*2.8)=0.423*(37.5*4*9-125*4*0.7)=0.423*(150*9-500*0.7)=0.423*(1350-350)=0.423*1000=423

3.75*4.23*36-125*0.423*2.8 =0,423X375X3.6-0.423X125X2.8=0.423X(125X3X3.6-125X2.8)=0.423X125X(10.8-2.8)=0.423X125X8=0.423X1000=423