第5课时 租船

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第5课时租船四则运算1优翼www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com问题1:从图中你得到了哪些信息?怎样租船最省钱?情景导入一 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com①老师带学生到湖中小岛去玩,一共有32人,②湖边有两种船,一种可以坐4人,一种可以坐6人,③坐4人的船每条租金24元,④坐6人的船每条租金是30元。有用信息情景导入一 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com结合生活实际,怎样租船比较划算?5探索新知二 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com分析思考大船每个座位5元小船每个座位6元租大船更便宜小船和大船的租金不一样小船租金:24÷4=6(元)大船租金:30÷6=5(元)?确定租大船探索新知二 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com分析思考全部租大船需要5条大船,2个人无坐32÷6=5(条)……2人因此需要5条大船,1条小船。5条大船,1条小船:30×5+24×1=174(元)但是租5条大船,1条小船,小船会空出2个座位。探索新知二 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com分析思考如果不空座位会不会更省钱?把小船上的2人和一条大船上的6人都安排坐2条小船,还可以更省钱。4条大船+2小小船:30×4+24×2=120+48=168(元)探索新知二 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com回顾反思解决这类问题需要注意什么呢?先要考虑租哪种船便宜还要?探索新知二 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com假期张华的父母带着他和爷爷、奶奶、姥姥、姥爷去××山旅游,他们准备坐缆车上山。他们怎样买票比较合算?巩固练习三 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com巩固练习三答:他们买8张团体票比较合算。 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com我们要解决怎样租船最省钱这个问题,先求出小船每个座位要多少钱,大船每个座位要多少钱,对比之后,确定租哪种便宜,再调整到空座最少为止就最省钱。课堂小结四 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com课后练习五 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com课后练习五 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com课后练习五 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com怎样租车最省钱?4.春游。课后练习五 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com课后练习五 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com选方案二合算。(1)成人6人,儿童4人,选哪种方案合算?5.旅行社推出“××风景区一日游”的两种价格方案。团体10人以上(包括10人)100×10=1000(元)课后练习五 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com5.旅行社推出“××风景区一日游”的两种价格方案。团体10人以上(包括10人)(2)成人4人,儿童6人,选哪种方案合算?选方案一合算。100×10=1000(元)课后练习五 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com课后练习五 www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com×÷÷÷+÷×-÷×--×-++÷+答案不唯一课后练习五

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