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部编小学二、三年级的数学教材中,先后多次分散出现了“比一个数多几”和“比一个数少几”这类数量关系的应用题,无论从内容或形式上,都比省编算术教材加深了。我们曾对三年级学生进行了一次摸底检查,出了这样一道题:“学校食堂本月用煤2500公斤,比上月少用了500公斤,求上月用煤多少公斤?”与考的54个学生,仅8人解答正确,出错率达85％。因此,我们认为对“比……多”和“比……少”这类应用题的教学必须引起重视,对它的教法应予研究。下面谈谈我们在教学中的几点体会。
In the second and third grade math textbooks of the primary and secondary schools, there are many problems in the application such as “how many more than one number” and “less than one number” appear in the mathematics textbooks of primary and secondary schools, both in content and form Provincial arithmetic teaching material deepened. We had a third grade students a thorough examination, out of such a question: “School canteens this month with 2500 kilograms of coal, less than 500 kilograms last month, last month, how many kilograms of coal?” And test 54 A student, only eight people correct answer, error rate of 85%. Therefore, we think that we should pay more attention to the teaching of such applied questions as “more” and “less than ... less”, and its teaching should be studied. Here to talk about our experience in teaching.