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El Proyecto Aristóteles es un centro de creación de materiales didácticos en áreas fundamentales de la educación. Este libro es el Tomo I de la Colección de Problemas de Matemáticas para 4º de Primaria, organizada en progresión de dificultad. En él encontrarás 150 problemas de multiplicaciones, divisiones, fracciones, magnitudes, etc., con los que poner a prueba los conocimientos matemáticos de los niños de esta edad.

It was September 14, 1814, and America and Great Britain were at war. Frances Scott Key watched from the deck of a British ship, where he was being held captive, as cannons exploded around them. After 25 hours, the fighting ceased and Key peered through the clearing smoke, looking for some sign as to the outcome of the battle. Was the American flag still flying? His wartime experience inspired Key to write a poem, which was later set to music and became America’s national anthem. This book tells the story of the inspiration behind our national anthem, which helped transform the flag into a...

Una maravillosa historia de amor. La vida de Frank Bradley es simple y tranquila. Cinco años después de haber abandonado su trabajo como corredor de bolsa en la Gran Manzana, no se arrepiente de haber elegido comprar un edificio de apartamentos en ese pequeño pueblo costero ni tampoco haber decidido ser el casero del lugar. Aliena Ruslan es una resuelta veterinaria que, a base de esfuerzo y amor por su profesión, y por sus pacientes, ha logrado establecer una clínica de bastante éxito junto con sus socios y mejores amigos. Un vivaz perro callejero hace que los caminos de Frank y Ali se...

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute...