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教学目标:1.结合具体的情境和直观操作活动,让学生探索并发现“三角形任意两条边的和大于第三边”“较短两边和大于第三边”。2.感受动手实验是探索教学规律的途径和方法。3.培养学生初步应用数学知识解决实际问题的能力。教学过程:一、创设情境,提出问题1.复习、回顾三角形的特征谈话:我们已经认识了三角形,现在老师请同学们在纸上画一个你最喜欢的三角形(学生画三角形)。结合大家刚才画的三角形,谁来说一说三角形有什么特点?
Teaching Objectives: 1. Combining with specific contextual and intuitive operating activities, students are encouraged to explore and discover that “any two sides of the triangle are greater than the third side”, “shorter sides and greater than the third side.” 2. Feel the hands-on experiment is to explore the teaching methods and methods. 3. Students develop the initial application of mathematical knowledge to solve practical problems. Teaching process: First, create the situation, ask questions 1. review, review the characteristics of the triangle Talk: We have learned the triangle, and now the teacher asked the students to draw a paper on your favorite triangle (students draw a triangle). Combined with the triangle we just painted, who say that there are any characteristics of the triangle?