有位顾客买了6瓶啤酒,每瓶2.5元.退瓶时,售货员说:“每只瓶比酒钱少0.5元.”顾客
问题描述:
有位顾客买了6瓶啤酒,每瓶2.5元.退瓶时,售货员说:“每只瓶比酒钱少0.5元.”顾客
答
6元
[(2.5-0.5)/2]*6=6