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http://dx.doi.org/10.7468/jksmec.2019.22.2.129

An Analysis on the Contents of Fractional Operations in CCSSM-CA and its Textbooks  

Lee, Dae Hyun (Gwangju National University of Education)
Publication Information
Education of Primary School Mathematics / v.22, no.2, 2019 , pp. 129-147 More about this Journal
Abstract
Because of the various concepts and meanings of fractions and the difficulty of learning, studies to improve the teaching methods of fraction have been carried out. Particularly, because there are various methods of teaching depending on the type of fractions or the models or methods used for problem solving in fraction operations, many researches have been implemented. In this study, I analyzed the fractional operations of CCSSM-CA and its U.S. textbooks. It was CCSSM-CA revised and presented in California and the textbooks of Houghton Mifflin Harcourt Publishing Co., which reflect the content and direction of CCSSM-CA. As a result of the analysis, although the grades presented in CCSSM-CA and Korean textbooks were consistent in the addition and subtraction of fractions, there are the features of expressing fractions by the sum of fractions with the same denominator or unit fraction and the evaluation of the appropriateness of the answer. In the multiplication and division of fractions, there is a difference in the presentation according to the grades. There are the features of the comparison the results of products based on the number of factor, presenting the division including the unit fractions at first, and suggesting the solving of division problems using various ways.
Keywords
fraction; operation of fraction; mathematics textbook; CCSSM-CA;
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