5.6×1.01-0.56
=5.6*1.01-5.6*0.1
=5.6*(1.01-0.1)
=5.6*0.91
=5.096为什么0.56=5.6*0.11.01-0.1=0.91提取公因式---5.65.6×1.01-0.56 =5.6*1.01-5.6*0.1=5.6*(1.01-0.1)=5.6*0.91=5.096就是了