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A Comparative Analysis of Decimal Numbers in Elementary Mathematics Textbooks of Korea, Japan, Singapore and The US  

Kim, JeongWon (Sjntanjin Elelmentary School)
Kwon, Sungyong (Gongju National University of Education)
Publication Information
School Mathematics / v.19, no.1, 2017 , pp. 209-228 More about this Journal
Abstract
Understanding decimal numbers is important in mathematics as well as real-life contexts. However, lots of students focus on procedures or algorithms of decimal numbers without understanding its meanings. This study analyzed teaching method related to decimal numbers in a series of mathematics textbooks of Korea, Japan, Singapore and the US. The results showed that three countries except Japan introduced the decimal numbers as another name of fraction, which highlights the relation between the concept of decimal numbers and fractions. And limited meanings of decimal numbers were shown such as 'equal parts of a whole' and 'measurement'. Especially in the korean textbooks, relationships between the decimals were dealt instrumentally and small number of models such as number lines or $10{\times}10$ grids were used repeatedly. Based these results, this study provides implications on what and how to deal with decimal numbers in teaching and learning decimal numbers with textbooks.
Keywords
Decimal numbers; Elementary Mathematics Textbooks;
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