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【教学内容】北师大版三年级下册第39-40页,41页“练一练”中相应的题目。【教材分析】1.知识基础。教材在一、二、三年级已经编排了“认识物体”、“有趣的图形”、“认识图形”、“周长”。为本课学习面积概念在思想方法和知识上奠定了认知基础。本课的学习也为后面学习面积单位以及正方形、长方形、圆形等平面几何图形面积的计算,在思想方法上奠定了基础。
Teaching Content】 【Beijing Normal University version of the third grade volumes on the next page 39-40, 41 “practice a practice” in the corresponding topic. 【Teaching Materials】 1. knowledge base. Textbooks in the first, second and third grade have been arranged “recognize objects ”, “interesting graphics ”, “understanding graphics ”, “circumference ”. The concept of learning area for this lesson has laid a cognitive foundation in the way of thinking and knowledge. The study of this course also lays the foundation for the method of thinking after calculating the area of the plane, the rectangle, the circle and other plane geometric figures for learning the area unit and later.