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一、谜语激趣,导入新课师:同学们喜欢猜谜语吗?请听好:“旭日东升——打一数字”。生:是9!因为“旭”字中的“日”走了,剩下了“九”!师:真聪明!再来一个:“数字虽小,却在百万之上。”生:是一!因为“百”和“万”字的上头,第一笔都有一个“一”!师:咱们同学可真是太棒了!我们认识的数字有哪些呀?生:有1、2、3、4、5、6、7、8、9、0。师:同学们,数字只有十个,但是按照不同要求、不同顺序编排起来,就会千变万化,能够传递各式各样的信息,这节课就来学习“神奇的数字编码”。(板书)
First, the riddle excited, into the new class teacher: Students like riddles? Please listen: “rising sun - playing a number ”. Health: 9! Because “Xu ” in the word “Japan ” gone, leaving “9 ” division: Really smart again another: “The figure is small, On the top of the word ”“ and ”“, the first one has a ”a “ teacher: our classmates is really great! We know What are the numbers? Health: a 1,2,3,4,5,6,7,8,9,0. Teacher: My classmates, the number is only ten, but according to different requirements, in different order orchestration, will be ever-changing, able to pass a wide range of information, this class to learn ”magic number coding ". (writing on the blackboard)