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使用教材:上海市九年义务教育课本数学(试用本)二年级第一学期第82页。教学过程:一、建构平方数概念师:(出示)这是一张点图,正方形里有一个点,它表示1。今天我们就一起来研究点图与数。(出示课题)师:用2张点图,表示2,可以摆成什么图形?生:长方形。(出示)师:用3张点图呢?生:长方形。(出示)师:用4张点图,表示4,这回能摆成什么形状呢?
Use of teaching materials: Nine years of compulsory education in Shanghai textbook mathematics (trial version) second grade first semester 第 82 页. Teaching process: First, the number of square construction concept: (Show) This is a point map, the square has a point, which means 1. Today we will work together to study dot plots and numbers. (Show subject) Teacher: With 2 dots map, said 2, what can be put into the graph? Students: rectangular. (Show) Teacher: With 3 Plotters Health: Rectangle. (Show) Teacher: With 4 dots, that 4, what can be put into shape this time?