到哪个商店购买省钱?

  • 时间:2020-04-08 13:55:35
  • 分类:数学世界
  • 阅读:106 次

学校布置新办公大楼要购买50张办公桌,现在有甲、乙、丙三个家具商店可以选择,三个商店办公桌的价格都是200元。请你帮老师算一下,到哪个商店购买省钱?

甲店:购买10个办公桌免费赠送2张,不足10张不赠送。

乙店:每张办公桌优惠35元,不赠送。

丙店:购物满400元,返还60元。

数学题解答

甲店需要钱:先买40张,每10张送2张,这样共有48张办公桌了,再买两张就行了。共花钱:(40+2)×200=8400(元)

乙店需要钱:(200-35)×50=8250(元)

丙让需要钱:50×200÷400=25(个)…………有25个400元,所以返还:25×60=1500(元),10000-1500=8500(元)

8250<8400<8500

答:在乙店购买办公桌最省钱。

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