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最近,看到某小学四年级一张数学试卷,发现其中一道自编的应用题缺乏科学性,原题是:“长江比黄河长9.16公里,长江和黄河共长11844公里,长江和黄河各长多少公里?”从纯数学的角度来看,这道题无可非议,但从知识的角度来看,是有严重缺陷的.按题中数据计算,长江长5926.58公里,黄河长5917.42公里,这是不符合实际情况的.实际上据有关资料介绍长江
Recently, I saw a mathematics paper in a fourth-grade elementary school and found that one of the self-produced applications lacked scientificity. The original title was: “The Yangtze River is 9.16 kilometers longer than the Yellow River, and the Yangtze River and the Yellow River are a total of 11,844 kilometers. Each of the Yangtze River and the Yellow River is long. How many kilometers? From a purely mathematical point of view, this question is beyond reproach, but from a knowledge point of view, there are serious flaws. According to the data in the calculation, the Yangtze River is 5926.58 kilometers and the Yellow River is 5717.42 kilometers. This is not In line with the actual situation, in fact, according to relevant information on the Yangtze River