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De Castro Hernández, Carlos ; Segovia Álex, Isidoro ; Castro Martínez, Enrique | University of East Anglia | 2002In this study we have analyzed the estimation strategies employed by preservice elementary teachers. It has been used an alternative model for the description of computational estimation strategies. In this model, strategies are integrated by ap[...]texto impreso
De Castro Hernández, Carlos ; Castro Martínez, Enrique ; Segovia Álex, Isidoro | University of East Anglia | 2002In this study we analyze the difficulty of computational estimation tasks –with operations without context– in function of the operation type –multiplication and division– and number type –whole, decimal greater than one and decimal less than on[...]
