简便方法计算:14.5+6.65*39.9+25.4+2.35*39.9

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/03 09:20:28
简便方法计算:14.5+6.65*39.9+25.4+2.35*39.9

简便方法计算:14.5+6.65*39.9+25.4+2.35*39.9
简便方法计算:14.5+6.65*39.9+25.4+2.35*39.9

简便方法计算:14.5+6.65*39.9+25.4+2.35*39.9
14.5+25.4+(2.35+6.65)*39.9
=39.9+9*39.9
=39.9*(1+9)
=399