54*56/55-27*28/27 马上要
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:综合作业 时间:2024/07/26 06:15:27
54*56/55-27*28/27 马上要
![54*56/55-27*28/27 马上要](/uploads/image/z/1976662-46-2.jpg?t=54%2A56%2F55-27%2A28%2F27%E3%80%80%E9%A9%AC%E4%B8%8A%E8%A6%81)
54*56/55-27*28/27
=(55-1)*56/55-28
=55*56/55-56/55-28
=56-28-1-1/55
=27-1/55
=26又55分之54
=(55-1)*56/55-28
=55*56/55-56/55-28
=56-28-1-1/55
=27-1/55
=26又55分之54