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每个学生课前准备棱长1厘米的正方体方块24个。 1.操作。引导学生用24个棱长1厘米的正方体方块摆成长方体。学生的积极性很高,摆出了各种不同的长方体。 2.思考。要求学生闭起眼睛,想一想是怎么摆的。
Each student prepared before the class length of 1 cm square cube 24. 1. Operation. Guide students to square with a cube of 24 edges 1 cm square into a cube. The enthusiasm of the students is high, with a variety of different cubes. 2. Thinking. Ask students to close their eyes and think about how they are placed.