3.75乘4.23乘36-125乘0.423乘2.8

怎么简便计算

你好,提取公因数吧,

3.75*4.23*36-125*0.423*2.8
=4.23*(3.75*36-12.5*2.8)
=4.23*12.5*(0.3*36-2.8)
=4.23*12.5*8
=423
好了,你检查一下哦.
呵呵

3.75*4.23*36-125*0.423*2.8 =37.5*0.423*2.8*20-125*0.423*2.8 =（37.5*20-125）（0.423*2.8） =625*1.1844 =740.25 不知道对不对，呵呵

3.75*4.23*36-125*0.423*2.8 =3.75*10*0.423*36-125*0.423*2.8 =0.423*(3.75*10*36-125*2.8) =0.423*(37.5*36-125*2.8) =0.423*(75*4*9/2-1000*2.8/8) =0.423*(300*9/2-100*7/2) =0.423*(1350-350) =0.423*1000 =423

3.75*4.23*3.6-125*0.423*2.8 =3.75*4.23*4*0.9-12.5*4.23*2.8 =3.75*4*4.23*0.9-12.5*4.23*2.8 =15*4.23*0.9-12.5*4.23*2.8 =4.23*(15*0.9-12.5*2.8) =4.23*(13.5-12.5*4*0.7) =4.23*(13.5-5*0.7) =4.23*(13.5-3.5) =4.23*10 =42.3.

3.75*4.23*36-125*0.423*2.8=3.75*4.23*2*18+5*25*0.423*2.8=7.5*4.23*18+14*25*0.423=7.5*0.423*10*18+350*0.423=0.423*(7.5*18+350)=0.423*(135+350)=205.2

3.75×4.23×36-125×0.423×2.8

=0.423×（3.75×10×36-125×2.8）

=0.423×[（3.75×4）x（10×9）-（125×4）x0.7）]

=0.423×（15×90-500×0.7）

=0.423×（1350-350）

=0.423×1000

=423