Enhance students' number sense and illustrate some surprising properties of this alternative operation.

Contributor Notes

Eric McDowell, emcdowell@berry.edu, is a professor of mathematics at Berry College, near Rome, Georgia. Although his traditional research area is in the area of topology, he has a strong interest in mathematical pedagogy. He also writes songs and produces videos about mathematics that can be viewed on the World Wide Web.

(Corresponding author is McDowell emcdowell@berry.edu)
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