【教学片段一】1.大家知道,我们今天上的是数学课,数学课就是和数打交道,这些数大家认识吗?(出示1,2,3,4,5)2.不要小看了1,生活中好多事都可以归到1的上面,如:一张桌子、一块黑板、一个人。3张桌子怎样用1来表示?50个苹果呢?3.你还能举这样的例子吗?4.像一个人、一箱苹果、一排桌子等,我们在数学上可以看做一个整体。(出示一个整体的概念,并齐读) [A piece of teaching] 1. We all know that we are in today’s math class, math class is dealing with the number of these people we know it? (Show 1,2,3,4,5) 2. Do not underestimate the 1 A lot of things in life can be attributed to a above, such as: a table, a blackboard, a person. 3 tables how to use 1 to indicate? 50 apples? 3. Can you give an example of this? 4. Like a person, a box of apples, a row of tables, etc., we can think of mathematics as a whole. (Show a whole concept, and read it all together)