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一个数比另一个多(或少)几分之几的分数问题一直是小学数学里面的一块硬骨头,这几乎是各个时期、各种版本的教材实施过程中都不可回避的一个问题,也是让所有教师都煞费苦心却无法让所有学生都能掌握的教学现实。为了能把问题说清楚,以下面两道数学题为例:(1)某工厂今年年产值10万元,比去年多2万元,今年的产值比去年多百分之几?(2)某工厂今年年产值10万元,比去年多25%,今年比去年的产值多多少万元?教过这个内容的老师心里都清楚,这两题无论是
The problem of a fraction of the number more or less than one is always a piece of elementary school mathematics, which is almost an issue that can not be evaded in the course of implementation of all the textbooks of different periods. Teachers are painstaking but can not make all students can grasp the teaching reality. In order to clarify the problem, take the following two math problems as an example: (1) A factory with an annual output value of 100,000 yuan this year, 20,000 yuan more than last year, this year’s output value is more than a few percent higher than last year? Factories this year, the output value of 100,000 yuan, 25% more than last year, more than this year’s output value of more than million? Teachers taught the content of the heart are clear, these two questions no matter