Índice de la unidad didáctica: La Proporcionalidad.


First two years of secondary education.

INDEX
	Introduction Aims Direct proportion. The rule of 3 - direct proportion. Inverse proportion. The rule of 3 - inverse proportion.

Ratio and Proportional division.

INTRODUCTION

This unit has been designed to introduce the concept of both direct and inverse proportional parts or quantities.

We will approach the above-mentioned concepts through a series of problems and exercises and also focus on methods which will allow us to apply these concepts to similar situations.

AIMS

To introduce the concept of proportion and its properties.
To introduce the concept of directly proportional quantities and find a method which can be used to solve problems involving these kinds of quantities.
To introduce the concept of inversely proportional quantities and find a method which can be used to solve problems involving these kinds of quantities.
To find similar relationships in different problems, and apply the methods explained earlier on in the unit to solve them.

Fernando Arias Fernández-Pérez


	Spanish Ministry of Education. Year 2001

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