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某商场做促销活动，一次性购物不超过500元的打九折优惠
【2019四川下-51】 某商场做促销活动，一次性购物不超过500元的打九折优惠；超过500元的，其中500元打九折优惠，超过500元部分打八折优惠。小张购买的商品需付款490元，小李购买的商品比原价优惠了120元。如两人一起结账，比分别结账可节省多少元钱？ A.10 B.20
公务员考试数量关系刷题组7/53
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