数学题:一种商品随季节出售

  • 时间:2020-06-05 20:41:20
  • 分类:数学世界
  • 阅读:148 次

数学题:一种商品随季节出售,如果按售价降低10%,任可盈利200元,如果降价20%,则亏损220元。这件商品原价是多少元?

数学题解答:降价10%和降价20%,这两种情况相差了原价的:20% – 10% = 10%

而盈利200元和亏损220元,一正一反相差了:200 + 220 = 420(元)

这420元即相当于原价的10%,所以原价是:

420 ÷ 10% = 4200(元)

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