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1、六年级奥数第六讲利润问题基本概念：商品购进的价格称为成本（也叫进价），商家在成本的基础上提高价格出售，提高后的价格称为定价（也叫售价），所赚的钱称为利润，利润占成本的百分之几叫做利润率。基本数量关系：1.利润=出售价成本价2.利润率=（出售价成本价）成本价100%3.出售价=成本价（1+利润率）4.成本价=出售价（1+利润率）典型例题例一、某商品按20%的利润定价，然后按八八折售出，实际获得利润84 元。商品的成本是多少元？例二、某商场在促销活动中，将一批商品降价处理。如果减去定价的12%出售，那么可以盈利 170 元；如果减去定价的20%出售，那么亏损150 元。此商品的购入价是多少元？例三
2、、足球赛门票15 元一张，降价后观众人数增加一半，收入增加了20%，则一张门票降价了多少元？例四、商店以每副30 元的价格购进一批羽毛球拍，又以每副40 元的价格售出。当剩下80副时，除已收回购进这批球拍所用的钱之外，还赚了100 元。这批球拍共有多少副？精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 1 页，共 3 页例五、张先生向商店订购某一商品，没件定价 100 元，共订购60 件。张先生向商店经理说：“如果你肯减价，每件每减价1元，我就多订购3 件。”商店经理算了一下，如果减价4%，那么由于张先生的订购增多，仍可获得与原来一样多的利润。这种商品的成本是多少元？专项训练
3、：1、某种商品的进价为800 元，出售时标价为1200 元。后来由于该商品积压，商店准备打折出售，但要保持利润率不低于5%，则最低可以打几折？2、某商场在十一促销期间，将一批商品降价出售。如果减去定价的10%出售，那么可盈利215 元；如果减去定价的20%出售，那么亏损125 元。此商品的购入价是多少元？3、某品牌西服原价800 元一套，为了促销，降低了价格，销量增加了1 倍，收入增加了40%。问每套西服降价多少元？精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 2 页，共 3 页文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:C
4、G7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6
5、O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 H
6、P6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K1
7、0Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10
8、 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5
9、B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7
10、文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z74、某书店出售一种挂历，每售出1本可得 18 元利润。售出一部分后每本减价10 元出售，全部售完。已知售完这种挂历本数是原价出售挂历的三分之二。书店售完这种挂历共获得利润 2870 元，书店售完这种挂历多少本？（用方程解）5、某商店第一天按定价300 元的价格出售
11、，共销售40 件；第二天降价8%，这样销量增加了 30%，所获得利润比第一天多120 元。这种商品的成本是多少元？思考题：1、甲乙两种商品的成本共2200 元。甲商品按 20%的利润定价，乙商品按15%的利润定价，后来两种商品都按定价的90%出售，结果仍获利润131 元。甲商品的成本是多少元？（用方程解）2、有一种商品，甲店进货价比乙店进货价低10%，甲店按 20%的利润来定价，乙店按15%的利润来定价，甲店的定价比乙店的定价便宜11.2 元。甲店进货价是多少？（用方程解）精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 3 页，共 3 页文档编码:CG7T4R6O7K7 HP
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13、Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10 ZZ4T5B6Q4Z7文档编码:CG7T4R6O7K7 HP6E4K10Y2A10
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