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【教学内容】苏教版小学数学四年级下册第109页“图形王国”第19~23题。【教学目标】1.通过对“图形与几何”知识的回顾和整理,进一步掌握三角形、平行四边形和梯形的特征,能解决与三角形边和角特性相关的数学问题;加深认识图形运动方式,熟练地在方格纸上把简单图形进行平移、旋转,或把一个轴对称图形补全;掌握用数对表示平面上的点,正确确定点的位置。
Teaching content】 【Sujiao primary school mathematics grade four volumes of the next page 109 “Graphics Kingdom ” 19 to 23 questions. Teaching Objectives 1. To further understand the mathematical problems related to the edge and corner features of triangles by further reviewing and sorting out the knowledge of “Graphics and Geometry” to further understand the characteristics of triangles, parallelograms and trapezoids; , Skilled in the simple graph on the squared paper to translate, rotate, or to complete an axisymmetric graphics complement; grasp the number of pairs of points on the plane, the correct point to determine the location.