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多边形面积计算是小学数学教学中的重要内容之一,其存在的价值不仅是要学生掌握“平行四边形”“三角形”“梯形”的面积公式以及运用公式解答简单的问题,而是要在面积计算过程中培养学生的空间观念和实践操作能力。所以,教师要有意识地改变简单讲授式教学模式,要通过有效地渗透数学思想,有意识地教会学生基本的解题方法——割补、拼摆法,这样才能真正提高学生的学习效率,才能在培养学生动手操作能力和主动探究能力的过程中促使学生获得良好发展。
Polygon area calculation is an important part of elementary mathematics teaching. Its existence value is not only for students to master the area formula of “parallelogram”, “triangle”, “trapezoid” and to solve the simple problem by formula, But to cultivate the student’s space concept and practical ability in the process of area calculation. Therefore, teachers should consciously change the simple teaching mode of teaching, through the effective infiltration of mathematical thinking, consciously teach students the basic problem-solving methods - cut, spell pendulum, so as to truly improve the efficiency of student learning in order to In order to cultivate students’ hands-on ability and proactively explore their abilities, students are encouraged to develop well.