北师大(2013版)五年级下册第四单元第44页体积单位的换算一节教材情境一如下:教材通过三幅情境图,动态呈现立方分米与立方厘米的换算过程,教学时,在复习回顾长度、面积单位换算的基础上,出示教材情境一,(如上图)进行新知教学,首先让学生读题,筛选题目中的数学信息,有了前面计算长方体、正方体的体积的知识经验和通过用1立方厘米、1立方分米的正方体摆长方体的活动经验,我打算放手让学生根据情境一自主探究两个相邻 The unit of text conversion is as follows: The textbook presents the conversion process of cubic decimeter and cubic centimeter dynamically through three scenarios. During teaching, On the basis of reviewing the review length and area unit conversion, teaching material situation 1 is presented (as shown above) for new knowledge teaching. First, students should read the questions, select the mathematical information in the topic, and have the knowledge of the volume of the cuboid and cuboid And through the activity experience of cubes with 1 cubic centimeter, 1 cubic decimeter cubes, I plan to let students independently explore two adjacent