论文部分内容阅读
在批阅安徽省2015年中考导向预测模拟试卷三第21题时,发现了大相径庭的两种答案,其解答过程都有凭有据,看上去似乎都很严谨.但是,从题目的内容来看,不可能出现两种不同答案,凭直觉我们就可以知道至少一种结果是错误的.数学是追求严密的科学,错误是教学的好材料,如此机会不容“错过”.因此,笔者对这一问题进行了深入的思考,现将思考所得整理出来,与大家讨论.1.原题呈现.商场在春节期间,开展“砸金蛋,送红包”活动,凡一次购物满千元就可获得砸金蛋机会,每次砸两个金蛋.如图1,还剩下三串6个金蛋,其中只有B蛋中藏有
In the review of Anhui Province in 2015 test guidance forecasting simulation test paper No. 21, I found two very different answers, the answer process has its own evidence, it seems very rigorous.However, from the point of view of the content, Can not be two different answers, intuition we can know at least one result is wrong.Mathematics is the pursuit of rigorous science, the error is a good teaching material, so the opportunity can not A problem in-depth thinking, now think out the income sorted out, to discuss with you .1 original title show .Shopping during the Spring Festival to carry out “hit the golden egg, send a red envelope” activities, where a purchase of a thousand dollars Get the opportunity to hit the golden egg, hit two gold eggs each time, as shown in Figure 1, the remaining three strings of six golden eggs, of which only eggs hidden in B