1.25*5.6+2.25*3.6的简便运算的步骤

问题描述:

1.25*5.6+2.25*3.6的简便运算的步骤

1.25*5.6+2.25*3.6
=1.25*0.8*7 + 2.25*4*0.9
=7+9*0.9
15.1