论文部分内容阅读
学生对人教版九年级上册第二十二章“实际问题与一元二次方程”《教师教学用书》VI评价建议与测试第13题提出了异议.原题为:百货商店服装柜在销售中发现,某品牌童装平均每天可售20件,每件盈利40元.为了迎接“六一”国际儿童节,商场决定采取适当降价措施,扩大销售量,增加盈利,减少库存.经市场调查发现:如果每件童装降价1元,那么平均每天就多售出2件.要想平均每天销售这种童装盈利1200元,那么每件童装应降价多少元?
Students on the PEP Ninth grade Chapter twenty-second chapter “practical problems and a quadratic equation ” “teaching book for teachers ” VI evaluation recommendations and test questions raised the objection.The original title is: department store clothing in Sales found that a certain brand of children’s clothing can sell an average of 20 pieces per day, each profit of 40. In order to meet the “61” International Children’s Day, the mall decided to take appropriate measures to reduce sales and expand sales, increase profits and reduce inventory. Market research found that: if each piece of clothing price 1 yuan, then the average daily more than sold 2. Want to sell an average daily profit of this children’s clothing 1200 yuan, then how much should each piece of children’s clothing price?