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

El amor y la amistad también se construyen dialogando. Algunos piensan que la amistad puede nacer y desaparecer en un solo instante, otros opinan que una amistad verdadera dura toda la vida... No hay una única respuesta para las grandes preguntas de la vida. No existe sólo una forma de pensar. Cada quien debe construir, buscar, construir la suya propia. Doce ideas sobre el amor y la amistad se confrontan en este libro.

Discusses Things That Rot And Break Down And Things That Don't, How Decomposing Things May Feed Insects Or Animals Or Help The Soil, And Talks About Recycling.

Brief biographies of well-known men and women, from ancient time to the present day, who made significant contributions in various fields.

Lyndon B. Johnson was born in Texas in the early 1900s. This appealing biography has been translated into Spanish and highlights Johnson's life as he represented Texas in the United States Congress for 24 years and became the 36th President of the United States. Through engaging images, intriguing sidebars and facts, easy to read text, and a supportive glossary and index, readers will learn about interesting topics such as the Higher Education Act, Voting Rights Act, Minority Whip, and the Vietnam War. Readers will be eager to learn more about Johnson's fascinating life as they move from...