Resources and Tools for Elementary Math Specialists and Teachers
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This Nim-like interactive Flash game provides an opportunity to practice basic addition and subtraction while developing strategic thinking through generalization and by applying knowledge of factors and multiples. It can be played against the computer or a friend. Players take turns adding a whole number from 1 to 4 to a running total. The player who hits the target of 23 wins. Computer settings allow changing the target number, the range of numbers to add, who goes first, and whether the player reading the target wins or loses. The Teachers' Notes page offers suggestions for implementation, discussion questions, ideas for support, and links to related games.
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Contributed by: Millennium Mathematics Project, Publisher
Math TopicNumber Sense, Basic Operations, Number Concepts, Mathematical Practices, Mathematical Processes
Grade Level1, 2, 3, 4, 5
Resource TypeActivity, Game, Interactive Media

  • Additional Information
    • AudienceLearner
    • LanguageEnglish (USA)
    • Education Topic
    • Interdisciplinary Connection
    • Professional DevelopmentNo
    • ContributorMillennium Mathematics Project, Publisher
    • Publication Date2009-02
    • 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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