131313/272727+130130/270270+13001300/27002700=
来源：学生作业帮助网 编辑：六六作业网 时间：2024/07/07 10:51:17
131313/272727+130130/270270+13001300/27002700=131313/272727+130130/270270+13001300/27002700=131313/2
131313/272727+130130/270270+13001300/27002700=
131313/272727+130130/270270+13001300/27002700=
131313/272727+130130/270270+13001300/27002700=
13/9