n Learning and Teaching Mathematics - Do infinite things always behave like finite ones?

Volume 2009, Issue 7
  • ISSN : 1990-6811


In a calculus class for pre-service teachers the lecturer asked the prospective teachers to explore whether 0.999... is equal to 1. Unsurprisingly the majority of the class's initial response was that 0.999... is less than 1. After some research and through discussion with the lecturer some groups of students came up with arguments that show that 0.999... = 1.

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