22.05*82-20.05*4.5-20.05*8简便方法怎么算?

来源:学生作业学帮网 编辑:学帮网 时间:2024/05/31 14:46:02

22.05*82-20.05*4.5-20.05*8简便方法怎么算?

22.05*82-20.05*4.5-20.05*8
=20.05*(82-4-8)+2*82-20.05*0.5
=20.05*70+164-10.025
=1557.475