﹙1½+½+⅓+¼﹚÷﹙½+⅓+¼﹚

来源:学生作业学帮网 编辑:学帮网 时间:2024/05/20 01:08:44

﹙1½+½+⅓+¼﹚÷﹙½+⅓+¼﹚

=(18/12+6/12+4/12+3/12)÷(6/12+4/12+3/12)
=31/12÷13/12
=31/12x12/13
=31/13