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Proportional Reasoning: Jean Piaget, Formal Operational Stage, Child Development, Barbel Inhelder - Couverture souple

 
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Synopsis

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Proportionality is a mathematical relation between two quantities. Proportional reasoning is one of the skills a child acquires when progressing from the stage of concrete operations to the stage of formal operations according to Piaget's theory of intellectual development. "In mathematics and in physics, proportionality is a mathematical relation between two quantities." There are two different views of this "mathematical relation"; one is based on ratios and the other is based on functions.

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