西餅每件售4.5元,如買6件或以上,每件可減0.4元,小明買了西餅一打,需付多少元?
答案唔係4.5x12-0.4x6!!!!!!!!!!!!!!!!!!!!!!!!!
收錄日期: 2021-04-13 21:49:47
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080305000051KK03261