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利用一元一次方程解销售问题时,若把握不准概念,理解不透公式,则容易出现各种各样的错误,现将经常出现的错误归纳如下.例1某商店一次卖出两套西服,每套均卖1680元,其中一套赢利20%,另一套亏损20%,商店在这次销售中().A.赢利B.亏损C.不赢不亏D.无法判断错解:赢利1680×20%=336(元).亏损1680×20%=336(元).因为两者相等,所以商店在这次销售中不赢不亏.故应选C.剖析:赢利和亏损都是相对成本价而言的,而不是相对售价,本题错在把赢利(亏损)
The use of a one-time solution to the problem of sales, if you grasp the concept of not allowed to understand, impervious formula, prone to a variety of errors, now the mistakes are summarized as follows.Example 1 a shop to sell two suits at a time, Each set sold 1680 yuan, of which a set of 20% profit, another set of 20% loss, the store in this sale () A. Profit B. Losses C. No win no loss D. Can not determine the wrong solution: Profit 1680 × 20% = 336 (yuan). Loss of 1680 × 20% = 336 (yuan). Because they are equal, so the store does not win the loss in this sale, it should be selected C. Analysis: Profit and loss are Relative cost price terms, rather than the relative price, the wrong question in the profit (loss)