38.57-(27.14+4.57)+72.86

来源:学生作业学帮网 编辑:学帮网 时间:2024/05/16 09:02:21

38.57-(27.14+4.57)+72.86

38.57-(27.14+4.57)+72.86
=38.57-4.57-27.14+72.86
=34-27.14+72.86
=34+72.86-27.14
=106.86-27.14
=79.72