Sumando y Restando en el Club de Matematicas

Con esta sencilla guía podrás hablar desde el primer día un idioma que comparten más de 240 millones de personas de todo el mundo. Pensada para estudiantes, turistas, gente del mundo de los negocios o cualquier persona que busque un conocimiento básico del portugués. Contiene un poco de gramática y ortografía, ejercicios prácticos, anécdotas, datos culturales sobre los países de habla portuguesa y referencias útiles y divertidas, entre ellas un minidiccionario y una lista de los principales verbos de uso cotidiano. Encontrarás los ejercicios del libro en formato MP3 en la ficha...

The sun is responsible for all life on Earth, but what exactly is it? Our star is an amazing force that can be as dangerous as it is important. From solar flares to the threat of blowing up altogether, the sun is one of the most interesting things in our solar system. Readers take a trip to the sun to see how it works and exactly what it is made of. They’ll learn about the life cycle of a star and see just how long we have until we have to find a new planet to call home. Don’t worry, they’ll be happy to learn that (hopefully) we have millions of years left!

The greatest thinkers of humanity at your fingertips, in minutes! If you thought you would never be able to understand the essential classic authors, you were wrong! With our "Summarized Classics" collection, you will understand the main ideas of the most important thinkers in a very short time and with little effort. The present volume covers the central axes of this discipline. Among them, the reader will find an analysis of the following Genetic Psychology Studies (1973) and Structuralism (1968), among others. It includes a glossary.

Introduces readers to amphibians and the concept of classes of animals. Simple text describes the common features and behaviors of amphibians as well as offering many examples of creatures in this group.