知识目标:让同学们通过把一些一样的正方体或长方体拼接成长方体的操作过程,探索并发现拼接前后有关表面积的变化规律,并解决一些实际问题。能力目标:让同学们在操作中进一步积累空间与图形的识别能力。情感态度:使同学们进一步感受图形学习的价值,提高学习数学的兴趣。 Knowledge Goal: To let students explore the process of changing the surface area before and after splicing and solve some practical problems by splicing some of the same cubes or cuboids into rectangular cubes. Ability goal: Let the students in the operation further accumulation of space and graphics recognition ability. Emotional Attitude: To make students further appreciate the value of graphic learning and improve their interest in learning mathematics.