Ratios and proportions

Hi, today we start as usual, but only with this one:

1. https://chemarias.com/cm/tabla/index.html. Three attempts and one screenshot.

Today we start a new unit, proporcionality, in which the most important concepts are ratios and proportions. Here you have an article about them:

Ratio and Proportion in Math

But we are going to use this clasroom to learn a bit about that with the help of  Javier Cayetano:

• 2. Razón y proporción. Jugamos con los conceptos básicos – GeoGebra

Next one, the rule of three. First an explanation:

Rule of Three is a Mathematical Rule that allows you to solve problems based on proportions

And now, some exercises:

• 3. Proporcionalidad directa. Regla de Tres – GeoGebra

Percentages are an special case of proporcionality, quite common. Some exercises:

• 4. Calcula el porcentaje… – GeoGebra
• 5. ¿Cuánto es ese porcentaje? – GeoGebra