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一、教学内容:长方形面积的计算(小学数学第七册)。二、教学要求:使学生理解和掌握长方形的面积公式,并能正确运用公式进行计算。三、教学过程: (一)检查复习:1.什么叫面积?计算面积用什么单位?常用的面积单位有哪些? 2.什么叫1平方厘米?1平方分米?1平方米? 3.1分米、1平方分米各表示什么单位? (二)导入新课:出示两个长方形提问:1.黑板上是两个什么图形? 2.哪个长方形的面积大?大多少? 师:同学们的说法不一,要正确地回答这个问题,单靠观察是不行的。今天我们就来研究长方形面积的计算。 (板书课题:长方形面积的计算) (三)新课: 1.①指名到黑板前量出黑板上两个长方形长与宽各是多少(边量边说出结果)。 (板书:长3分米宽2分米长6分米宽1分米)
First, the teaching content: the calculation of the rectangular area (seventh grade mathematics in primary school). Second, the teaching requirements: to enable students to understand and grasp the rectangular area formula, and the correct use of formulas for calculation. Third, the teaching process: (A) check review: 1. What is the area? What area is calculated using the unit? Commonly used area units are what? 2. What is 1 square centimeter? 1 square decimeter? 1 square? 3.1 decimeter , 1 square decimeter each said what unit? (B) into the new lesson: to produce two rectangular questions: 1. What are the two blackboard graphics? 2. What is the area of a large rectangle? Different, to correctly answer this question, alone can not be observed. Today we will study the calculation of rectangular area. (Board topic: Calculation of rectangular area) (C) New Lesson: 1. ① Named to the blackboard before measuring the length and width of the two rectangles on the blackboard (the amount of edge to say the result). (Blackboard: 3 meters long and 2 meters long and 6 meters wide and 1 meter long)