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.

Black holes are neither holes nor black. They're invisible and packed with matter! Future astronomers will find out many more fascinating facts about these space phenomena with this intriguing book. Carefully crafted text encapsulates the most important information about black holes, such as how scientists locate them and their significance in a star's life cycle. Amazing photographs support critical concepts and inspire a true appreciation of the spectacles of space.

In this engaging, Spanish-translated nonfiction book, early readers are introduced to the life cycle of a butterfly. Readers will be captivated by the vivid photographs of the butterfly's life, and informative text. This 6-Pack includes six copies of this title and a lesson plan.

There is a contest at a school to design a new playground. The students use blocks to build their models. As they build, they use three-dimensional shapes. Some students build a train out of blocks for the younger students to play on. Can you guess which three-dimensional shape they use for the train's wheels? Read to find out which design wins.

Los personajes de esta colección, un dragón, una momia y el capitán de la isla Calavera, han escondido sus tesoros. Llegar hasta el final de la aventura para encontrarlos no será nada fácil. Unas historias llenas de aventuras y criaturas espeluznantes. ¡Cuidado!, porque pueden asomar la cabeza entre las páginas.