What is a better buy? Rationale and empirical analysis of unequal ratios tasks in commercial offers contexts
Résumé
In this work, the comparison of unequal ratios tasks in commercial offers contexts is studied. A rational and empirical analysis of tasks helps to identify the critical components and students responses to each task. The results confirm the deficits in the relative thought of pre-service teachers, and also that their difficulties are not in the algorithmic aspects and “norming” techniques, but in conceptual aspects and ratio referents.
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