1、首先将2.5拆解成5*0.5,则 0.3*2.5*0.4=0.3*0.5*5*0.4
2、再计算5*0.4,则0.3*0.5*(5*0.4)=0.3*0.5*2
3、然后计算0.5*20.3*(0.5*2)=0.3*1
4、最后计算0.3*1,则0.3*2.猱蝰逾鸾5*0.4=0.3*0.5*5*0.4=0.3*0.5*2=0.3*1=0.3
1、首先将2.5拆解成5*0.5,则 0.3*2.5*0.4=0.3*0.5*5*0.4
2、再计算5*0.4,则0.3*0.5*(5*0.4)=0.3*0.5*2
3、然后计算0.5*20.3*(0.5*2)=0.3*1
4、最后计算0.3*1,则0.3*2.猱蝰逾鸾5*0.4=0.3*0.5*5*0.4=0.3*0.5*2=0.3*1=0.3