作业帮(-2/3)-( )=-1/3 (-15)-()=-100 (-2/3)+()=-1/3
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 22:57:35
(-2/3)-( )=-1/3 (-15)-()=-100 (-2/3)+()=-1/3
(-2/3)-( )=-1/3 (-15)-()=-100 (-2/3)+()=-1/3
(-2/3)-( )=-1/3 (-15)-()=-100 (-2/3)+()=-1/3
(-2/3)-(-1/3 )=-1/3 (-15)-(+85)=-100 (-2/3)+(1/3)=-1/3