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在统编教材中,分数、百分数应用题是小学数学应用题的主要组成部份,教授课时长,内容多,涉及的知识面广。同时,分数本身有几种意义,它的四则运算与整数四则运算相比,意义上既有相同之处,又有不同的地方,因此增加了解答的难度。本文分一般问题、三种基本问题、百分浓度问题、工程问题、利息问题、其他复杂问题几部份编写,以“注释”形式试析其解题方法,以期达到揭示其特点与规律的目的。
In the compilation of teaching materials, the score, the percentage of application questions is a primary part of the primary school mathematics application questions, teaching hours, content, involving a wide range of knowledge. At the same time, the scores themselves have several meanings. Compared with the four arithmetic operations of their four arithmetic operations, the scores have the similarities and differences in meaning, thus increasing the difficulty of answering the questions. This article is divided into general problems, three kinds of basic problems, percentage concentration problems, engineering problems, interest problems and other complex issues in several parts, with “comment” form to analyze its problem-solving method, in order to achieve the purpose of revealing its characteristics and laws .