“圆的面积”是小学数学五年级下册(青岛版)一节的重要内容,对该内容的教学历来被看作是一个难点。本课恰当地运用了多媒体辅助教学课件,通过观察课件中拼图形状的动态变化,让学生直观地“看”到了拼图形状的变化趋势,深刻地领会了极限思想,也领会了“以直代曲”“化圆为方”的转化思想,加深了对该内容学习时的理解和掌握,提高了课堂教学的效率。 “Circle area ” is an important part of the fifth grade of elementary school mathematics (Qingdao edition), the teaching of the content has always been seen as a difficult point. This course properly uses multimedia assisted teaching courseware, by observing the dynamic changes of the puzzle shape in the courseware, students can intuitively “see” the changing tendency of the shape of the puzzle, profoundly understand the limit idea and also understand the “ The straightforward thinking of ”turning round the circle into the side " deepens the understanding and mastery of the content learning and improves the efficiency of classroom teaching.