2.5*4.8简便方法计算3种
问题描述：
2.5*4.8简便方法计算3种
答
2.5*4.8 =(2.5*4)*(4.8/4)=10*1.2=122.5*4.8 =2.5*(4*1.2) =2.5*4*1.2 =10*1.2 =12 2.5*4.8 =2.5*(4+0.8) =2.5*4+2.5*0.8 =10+2 =12 2.5*4.8 =2.5*(5-0.2) =2.5*5-2.5*0...