Children can construct the concept of the natural number sufficiently, if they are engaged in activities concerning additive as well as multiplicative structures. Kindergarten children’s engagement with activities concerning the number as operator has a special research interest, as there is not a lot of work on it. In this workshop the activities discussed were part of a broader research program, which aims to the study of changes that occur to kindergarten’s children conception about natural number, when activities referring to the number as operator are proposed.
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