在商品销售问题中,首先要弄清进价、标价、售价、利润、利润率、打折等概念,并掌握它们之间的联系: 1.商品利润=商品的售价-商品的进价; 2.商品利润率=商品的利润÷商品的进价; 3.商品的售价=商品的标价×商品的售价折扣。学习了一元一次方程后,就可以解答中考和竞赛题中的某些商品销 In the issue of commodity sales, we must first understand the concept of purchase price, price, price, profit, profitability, discount, and grasp the relationship between them: 1. Product profit = the price of the commodity - the purchase price of the commodity; 2. Product profit rate = the profit of the product or the purchase price of the commodity; 3. The price of the commodity = the price of the commodity × the price of the commodity. After learning a single equation, you can answer some of the commodity sales in the exam and competition questions.