四年级数学上册第8单元《数学广角——优化》烙饼问题课件新人教版 .ppt

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数学广角, 烙饼问题,爸爸、妈妈 和我每人一张。,三张饼怎样烙时间最短?,1,2,3,操 作,1,2,3,1,1,2,3,2,1,2,3,1,2,3分钟,3,1,2,3分钟,1,1,3,1,2,3分钟,1,1,1,3,3,2,3分钟,3,3,1,3,2,3分钟,1,2,2,+ 3分钟,3,3分钟,1,+ 3分钟,ok,3,ok,3分钟,1,+ 3分钟,ok,ok,3,1,3分钟,1,+ 3分钟,1,ok,3,1,3分钟,+ 3分钟,ok,3,3,+ 3分钟,3,3分钟,+ 3分钟,ok,+ 3分钟,ok,ok,9分钟,如果要烙的是4张饼,5张10张饼?,饼数,最佳方法,所用时间(分),2,5,3,4,9,6,8,7,10,假设两个厨师做每个菜的时间都相等,应该按怎样的顺序炒菜?说说你的理由。,1,3,2,时间,每人每天得到的都是24小时,可是一天的时间给勤勉的人带来智慧和力量,给懒散的人只能留下一片悔恨。鲁迅,

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