第5课时 解决问题课件

1、状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,第 5 课时 解决问题,r四年级下册,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,怎样租船最省钱？,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,有哪些租船方法呢？,可以全部租大船，也可以全部租小船。,还可以大

2、船和小船混着租。,说一说,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,是多租大船便宜还是多租小船便宜？,小船：4 人乘坐需要 24 元，每人应付244=6（元）。,大船：6 人乘坐需要 30 元，每人应付306=5（元）。,比较发现：如果大船坐满，每人只需付5元，如果坐满小船，每人需付6元。,所以多租大船比较便宜！,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,326=5（条）2（人） 5条大船，1

3、条小船： 305 + 241=174（元）,我是这样做的,2人应该租1条小船。,租5条大船，1条小船时，小船只坐了2人，还有2个空位，没坐满。,如果不空座位，会不会更省钱？,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,6人、6人、6人、 6人、6人、2人,大船、大船、大船、大船、大船、小船,2条小船,把小船上的2人和1条大船上的6人都安排坐2条小船，会不会更省钱呢？,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路

4、,状元成才路,4 条大船和 2 条小船,4条大船：304120（元） 2条小船：24248（元） 12048168（元）,答：租4条大船和2条小船最省钱。,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,阅读与理解,分析与解答,回顾与反思,总结过程，形成方法,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,回顾解决租船问题的策略：,步骤一： 根据船的租金及限乘人数，先计算哪种船的租金更便宜。 步骤二： 再

5、假设所有人都乘坐租金便宜的船。 如果正好坐满，无空座，那么这种租法最省钱； 如果没坐满，就再调整，调整时要做到尽量让船坐满。,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,巩固练习,1. 我校共有老师14人，学生326人。全校坐车去春游，怎样租车最省钱？,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,大车 ：90040=22（元）20元 小车： 50020=25（元）租大车便宜 14+326=340（

6、人） 34040=8（辆）20（人） 8900+1500=7700（元） 答：租8辆大车，1辆小车最省钱。,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,2.旅行社推出“风景区一日游 ”的两种价格方案。,选方案二合算。,（1）成人6人，儿童4人，选哪种方案合算？,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,（2）成人4人，儿童6人，选哪种方案合算？,选方案一合算。,状元成才路,状元成才路,状元成才路

7、,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,3.某班共有44名同学一起到公园去划船。公园中现有大、小两种船，大船可以坐6人，租金是每小时10元/条，小船可以坐4人，租金是每小时8元/条，问怎样租船最省钱。,你是怎么想的？,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,方案一：假设都租大船 446=7（条）2（人） 7+1=8（条） 108=80（元）,方案二：假设都租小船 444=11（条） 118=88（元）,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,方案三：混租 7条大船和1条小船 107+8=78（元） 6条大船和2条小船 610+82=76（元）,答：租6条大船和2条小船最省钱。,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,通过本节课的学习，你有哪些认识