商店同时卖出两件上衣,每件售价均为120

  • 时间:2020-05-14 13:29:37
  • 分类:数学世界
  • 阅读:76 次

数学题:商店同时卖出两件上衣,每件售价均为120,但其中一件赚了百分之二十(20%),另一件亏本百分之二十(20%),请你算算,这两件上衣售后是赚了还是亏了?并计算出赚亏多少元?

数学题解答:第一件赚了20%,说明售价相当于进价的(1+20%),即120%,可算出这件衣服进价为:120÷ 120%=100(元)。第二件亏了20%,说明售价相当于进价的(1-20%),即80%,可算出这件衣服进价为:120÷ 80%=150(元)

这样我们便知道进货时,这两件衣服一共花了:100+150=250(元);而两件衣服卖出的总价格是120+120=240(元)。

所以总的来说,是亏了。一共亏了10元。(250-240=10)

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