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一、激趣导入师:同学们都知道《西游记》里的二师兄吗?生:知道!就是猪八戒。师:一次,大师兄悟空摘来一个大西瓜。悟空问八戒:“师弟,你是想多吃一点还是想少吃一点?”八戒说:“当然是想多吃一点。”“我把西瓜分成了4份,分别是这个西瓜的1/5、2/5、1/15和1/3,你想吃哪一份呢?”八戒(窃笑)说:“我吃1/15,师兄你吃1/3吧。”师:同学们想想,八戒是吃了多的那份吗?生1:八戒真蠢,多少都分不清。
First, the excitement import division: Students all know that “Journey to the West” in two brothers? Health: I know! Pigs. Teacher: Once, a big watermelon came from the big brother Wukong. Wukong Journey: “Teacher, do you want to eat a little or want to eat less?” “Eight said:” Of course, want to eat more. “” I divided the watermelon into 4 copies, respectively The watermelon 1 / 5,2 / 5,1 / 15 and 1/3, which one do you want to eat? “Jamboree (sniggering) said: ” I eat 1/15, brothers you eat 1 / 3 bars. "Teacher: Students think about it, Journey is to eat more shares? Health 1: Journey really stupid, how many can not tell.