著者

工藤 あい李 吉井 洋二

出版者

岩手大学教育学部附属教育実践総合センター

雑誌

岩手大学教育学部附属教育実践総合センター研究紀要 = The journal of Clinical Research Center for Child Development and Educational Practices (ISSN:13472216)

巻号頁・発行日

vol.15, pp.61-68, 2016-03-31

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Repeating decimals are taught in elementary, junior high and high school. However, they are usually not taught in university mathematics. We should learn the deep theory and some mystery of repeating decimals, and use them for teaching in several stages. We introduce some interesting examples of repeating decimals, and explain the mathematical background.