La historia de los sistemas numéricos: Valor posicional (The History of Number Systems: Place Value)

Este libro acerca a los niños al personaje de Alonso Quijano de modo que lo puedan entender.En él se muestra cómo pudo ser su infancia: dónde vivía, cómo era su familia, qué le enseñaban, qué le gustaba leer y a qué jugaba.El libro está dividido en cuatro apartados: dos de ellos tratan sobre los aprendizajes de Alonso y se desarrollan en su casa y en la escuela. El tercer apartado trata sobre aquello a lo que jugaban los niños de entonces y el cuarto representa lo que le gustaba leer y narra una sencilla historia al estilo de los libros de Caballerías.

Engineers have built some incredible things. But with every new feat, there is failure. Readers will learn about engineering feats like the Titanic, the Hindenburg, the Hoover Dam, and more in this engaging nonfiction title that has been translated into Spanish. This title features brilliant images, charts, and intriguing facts in conjunction with informational text and mathematic skills to keep readers active and engaged.

The underlying theme of Three Centuries of Greek Culture under the Roman Empire is the idea that, under Roman rule, Greek culture was still alive and dynamic and continued to exert a degree of cultural domination, either real or apparent. So, we hope to analyse the meanings of concepts such as “Greek” or “Greece” in the Empire. Are we right to assume that there was a clear opposition between Greek and Roman? Or would it be more accurate to speak of a “Graeco-Roman world”? It would certainly be possible to make a list of “elements of identity”, on both sides —Greek and...

Hamburg, 1947, a headless body is found in the ruins of a bombed out building. No evidence or identifying clues are left behind. Inspector Frank Stave, a man traumatized by the war, does not have high hopes of solving this case. When another victim is located, Stave knows he has a serial killer on his hands. The investigation that he launches puts his personal safety at risk.