Resources and Tools for Elementary Math Specialists and Teachers
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Doughnut

This problem requires students to have a good understanding of fractions and challenges children to visualize 3D shapes. Students are asked how to divide a doughnut into eight equal pieces using only three cuts. The Teachers' Notes page includes rationale, suggestions for implementation, discussion questions, and ideas for extension with a link to a worksheet and support.
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Contributed by: Millennium Mathematics Project, Publisher
Math TopicNumber Sense, Fractions, Mathematical Practices, Mathematical Processes, Basic Operations
Grade Level3, 4, 5
Resource TypeActivity

  • Additional Information
    • AudienceLearner
    • LanguageEnglish (United Kingdom), Chinese, Dutch, French, German, Italian, Spanish
    • Education Topic
    • Interdisciplinary Connection
    • Professional DevelopmentNo
    • ContributorMillennium Mathematics Project, Publisher
    • Publication Date1999-09
    • RightsCopyright (c) 2007 University of Cambridge
      http://nrich.maths.org/public/terms.php
    • AccessFree access
  • Standards
    • Common Core State Standards for Mathematics

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