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【教学内容】浙教版数学四年级上册第86、87页。【教学过程】一、比较算式,发现规律师:我国著名数学家陈省身先生说过“数学好玩”。今天我们就来玩个最强大脑游戏,看看你们能不能从中真正体会到“数学好玩”。第一关,看算式说得数。教师依次出示:1×1=11×11=111×111=(学生报出前两个算式的得数)师:111×111得数是多少?生:12321。师:答案先放着,一会儿我们再研究。如果要继续写下一个算式,这第4个算式是怎样的?
【Teaching content】 Zhejiao version of mathematics fourth grade on the first 86, 87 pages. Teaching process First, the comparison formula, found lawyers: Mr. Chen Sansheng, a famous mathematician in China, said “math fun ”. Today we come to play a strongest brain games to see if you can truly understand “math fun ”. The first pass, see the number of arithmetic. Teachers show in turn: 1 × 1 = 11 × 11 = 111 × 111 = (Students reported the number of the first two formulas) Division: 111 × 111 What is the number? Health: 12321. Teacher: The answer first stood, and we will study later. If you want to continue writing the next formula, this fourth formula is what?