创设有效的问题情境,有利于引导学生的认知冲突和学习兴趣,内化出主动思考的心理倾向,促使学生积极参与数学探索活动。但是,审视、反思我们的课堂教学会发现,问题情境的创设存在着随意、低效的现象,那就是用成人化的视角选取学习素材,“往往把孩子当成家庭主妇或单位的采购员、 Creating effective problem situations helps to lead students' cognitive conflicts and interest in learning, and internalizes the psychological tendency of active thinking, and encourages students to actively participate in mathematical exploration activities. However, when we examine and reflect on our classroom teaching, we find that there is a random and inefficient phenomenon in the creation of the problematic situation. That is, we select learning materials from an adult perspective. "Often, we regard children as purchasers of housewives or units,