Journal for Research in Mathematics Education, Vol. 5, No. 4 (Nov., 1974), pp. 197-211 (15 pages) The effects of negative instances on the acquisition of the mathematical concepts of commutativity and ...
(via PBS Infinite Series) In our last episode, we talked about different properties of multiplication: associativity and commutativity are the most familiar, but they’re just two of many. We also saw ...
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