Session 12

Sometimes, numbers are so big that we need tools to compare them, somehow. We can use fractions for that! Find the information that you need, and answer the following questions: 1) If the world had 100 people, how many people would live in Asia? And in Europe? And in Spain? 2) What fraction of the world's population live in those places? What about both? Can you approximate it using easier fractions? 3) How many people have access to drinking water? How many people don't? What fraction of the world's population are those? Can you approximate it using simpler fractions? 4) Discuss with your group, and express your feelings about your solutions. Do they make sense? Are fractions useful for understanding these quantities? (Podéis comentar y responder este apartado en castellano). Tip: Use the gadgets in previous sessions to represent your fractions. Tip: You can use expressions like the following: " _____ people live in Asia." "_____ of the world live in Asia."

In my hotel: - of the people are german. - of the people are french. - of the people are american. - of the people are japanese. 1) At least, how many people are staying in the hotel? 2) I have checked the numbers... and there has to be a mistake! Can you tell what it is?