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圆是小学数学最后教学的平面图形,也是平面图形中最为重要的曲线图形。日常生活中许多物体是圆形的或有圆形的面,还有一些物体的运动轨迹是圆形的。各种平面图形,如果周长相等,圆的面积最大。可见,学生有认识圆的客观需要。教学圆的知识,需要运用化曲为直、等积变形等思想与方法,能进一步发展学生的数学思维,提升学生的数学能力,促进学生感悟数学思想。因此,圆的知识具
Circle is the final plane of elementary mathematics teaching graphics, but also the most important graphic graphics plane. Many objects in everyday life are circular or circular surfaces, while others are circular in motion. A variety of graphic, if the circumference is equal, the largest area of the circle. Visible, students have an objective understanding of the needs of the circle. Teaching circular knowledge, you need to use the song straight, equal deformation and other ideas and methods to further develop the students’ mathematical thinking, improve students’ mathematical ability and promote students’ perception of mathematical thinking. Therefore, the circle of knowledge