Desafíos matemáticos

Sesenta autores, desde catedráticos de universidad hasta estudiantes de Secundaria y Bachillerato, nos presentan los cuarenta desafíos que la Real Sociedad Matemática Española propuso con motivo de su centenario.Son cuarenta estimulantes retos que avivan el ingenio. Enfrentándose a ellos, el lector se sentirá un auténtico investigador matemático.Pero no hay que asustarse. No es necesario saber muchas matemáticas. La herramienta esencial para resolver los desafíos es pensar ordenadamente.

Describes the frogs, toads, and salamanders of Mexico's Yucatan Peninsula, looking particularly at the wide variety of adaptations found in the few species that dwell there.

Modeled after the adult version of Oracional bilingüe: A Prayer Book for Spanish-English Communities, this volume for children encourages prayer across national, cultural, and linguistic borders. Oracional bilingüe para niños provides Spanish and English texts of the most loved and commonly used prayers in large, readable type and in an easy-to-follow, facing-page, parallel presentation. The English text appears on the left page, with the Spanish text directly across from it on the right. In addition, illustrations by well-known artist Gertrud Mueller Nelson complement each page and add to ...

Phoenix sueña con conocer el mundo que hay más allá de los altos muros que protegen su aldea. Un día, decide incumplir las normas y abandona su hogar para adentrarse en el bosque mágico del cual tantas leyendas ha escuchado. Pero su viaje prohibido tiene consecuencias fatales para su hermano Xander: cuando Phoenix regresa a la aldea, descubre que su hermano se ha convertido ¡en un horrible zombi!

Count the insects in groups of ten! Beginning readers will enjoy learning skip counting with this brightly illustrated Spanish book. Featuring vivid images and easy-to-read text, this full-color book develops students' math and reading skills and introduces them to early STEM themes. The Math Talk section includes questions that will increase understanding of basic math and reading concepts and develop students' speaking and listening skills. Learning to count is fun and easy with this engaging text!