4.5*3.6+4.5*6.5-4.5简便方法
问题描述:
4.5*3.6+4.5*6.5-4.5简便方法
答
4.5*3.6+4.5*6.5-4.5
=4.5*3.6+4.5*6.5-4.5*1
=4.5*(3.6+6.5-1)
=4.5*9.1
=40.95