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教学内容:人教版《义务教育课程标准实验教科书·数学》四年级下册第85页例5。教学目标:1.通过测量、剪拼、折拼等活动让学生全面经历探索和发现“三角形的内角和等于180°”的过程。
Teaching content: PEP Edition “compulsory education curriculum standard experimental textbook · Mathematics” Teaching Objectives: 1. Through the measurement, cut spelling, folding and other activities allow students to fully explore and discover “the inner corner of the triangle and the process is equal to 180 ”.