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    NCTM Illuminations
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    The rules of Krypto are amazingly simple—combine five numbers using the standard arithmetic operations to create a target number. Finding a solution to one of the more than 3 million possible...

    free Ages 8 - 14 10 to 30 minutes
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    NCTM Illuminations
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    In this math game, learners attempt to solve a puzzle involving five dice. By deciphering the non-standard pattern in the dice, learners use problem-solving and strategy skills. This lesson guide...

    free Ages 8 - 11 45 to 60 minutes

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