1.25乘以5.6加上2.25乘以3.6用简便方法怎么算谢谢
1.25乘以5.6加上2.25乘以3.6用简便方法怎么算谢谢
1.25*5.6+2.25*3.6=15.1 先算乘除,再算加减,这样比较简单,前俩个是7+8.1=15.1