Development of this multiplicative process involves unitizing within and across place.

Contributor Notes

James Brickwedde, jbrickwedde@projectmath.net, is an assistant professor in the Teacher Education Department at Hamline University and the director of the Project for Elementary Mathematics in St. Paul, Minnesota. He is interested in progressions in students' thinking about place value as they transition from additive to more multiplicative ways of thinking.

(Corresponding author is Brickwedde jbrickwedde@projectmath.net)
Teaching Children Mathematics

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