12.5x79+12.5x2-12.5简便算法
来源：学生作业帮助网 编辑：六六作业网 时间：2024/12/18 23:51:36
12.5x79+12.5x2-12.5简便算法12.5x79+12.5x2-12.5简便算法12.5x79+12.5x2-12.5简便算法12.5x79+12.5x2-12.5=12.5x(79+2-
12.5x79+12.5x2-12.5简便算法
12.5x79+12.5x2-12.5简便算法
12.5x79+12.5x2-12.5简便算法
12.5x79+12.5x2-12.5
=12.5x(79+2-1)
=12.5x80
=1000
12.5x79+12.5x2-12.5
=12.5*（80-1）+12.5*（2-1）
=125*8-12.5+12.5
=1000
=12.58＊（79+2-1）