课程标准对小学数学的要求,是发展学生的基本活动经验,建立数学现实和数学学习的直觉,学会运用数学思维的方式进行思考。注重培养学生的创新精神和探究实践能力。在教学中精心设计数学活动并进行有效引导,让学生真正经历探索和发现的研究过程,不仅能使学生学到数学知识,接触到一些研究数学的方法,同时可以使学生体会到探索发现的乐趣,获得成功的喜悦,爱上数学,从而促进学生数学素养的提升。在教学“三角形三边之 Curriculum standards for primary school mathematics requirements, is to develop the basic activities of students experience, the establishment of mathematical reality and mathematical intuition, learn to use mathematical thinking way to think. Focus on cultivating students’ innovative spirit and exploring practical ability. In the teaching of mathematical activities designed and effective guidance to enable students to really go through the exploration and discovery of the research process, not only enable students to learn math, access to some mathematical methods, but also allows students to experience the discovery of fun , The joy of success, fell in love with mathematics, thereby promoting the improvement of students’ mathematical literacy. Teaching ”triangle on the three sides