苏教版六年级数学下《折扣问题》

HAPPYEVERYDAY,折扣问题,HAPPYEVERYDAY,你见过以下这此促销的手段吗？,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,你知道这些折扣代表什么意思吗？,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,“几折”就表示现价是原价的百分之几十,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,“几点几折”“几几折”就表示现价是原价的百分之几十几,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,HAPPYEVERYDAY,练习题：,说说下面每种物品是打几折出售的。（1）一架钢琴按原价的70%出售。（2）一台电视机按原价的95%出售。,HAPPYEVERYDAY,所有图书一律八折销售,我买一本成语故事用了10元4角。,我买一本趣味数学，打八折是12元，原价是多少元？,八折就是80%，原价和实际售价有什么关系？,原价80%=实际售价,HAPPYEVERYDAY,先算出成语故事的原价是多少元，再进行检验。,解：设一本成语故事的原价是x元。,x80%=10.4,x=10.40.8,x=13,检验：用原价乘80%，看是不是等于10元4角。,1380%=10.4,用现价除以原价，看是不是打了八折。,10.413=0.8=80%,HAPPYEVERYDAY,只列式，不计算。,1、买一件T恤衫，原价80元，如果打八折出售是多少元？,八折80%0.8,800.864（元）,HAPPYEVERYDAY,只列式，不计算。,2、有一种型号的手机，原价1000元，现价900元，打几折出售？,900100090%九折,HAPPYEVERYDAY,只列式，不计算。,3、老师在商店里花了56元钱买了一条牛仔裤，因为那儿的牛仔裤正在打七折销售。请同学们猜猜看，这条牛仔裤原价多少元？,七折70%0.7,解：设这条牛仔裤原价x元。,0.7x=56x=80,检验：56800.7七折,HAPPYEVERYDAY,练习题：,2、王叔叔买一辆自行车，付了357元，原来买这辆自行车应付多少元？（自行车八五折出售）,1、,足球,收录机,书包,原价68.00元,原价380.00元,原价50.00元,九折出售,七五折出售,八八折出售,3、一台取暖器的原价是280元，现在的售价是252元。这台取暖器是打几折出售的？,HAPPYEVERYDAY,一种矿泉水，零售每瓶卖2元