La historia de: los sistemas numéricos: Valor posicional

Learn the history of number systems with this engaging Spanish book! This text combines mathematics and literacy skills, and uses practical, real-world examples of problem solving to teach math and language arts content. Students will learn place value while reading about the number systems of the Egyptians and Romans, and also learn important vocabulary terms like cuneiform, binary systems, roman numerals, and more! The full-color images, math charts, and practice problems make learning math easy and fun. The table of contents, glossary, and index will further understanding of math and...

If we could take a trip to the center of the Earth, what would we find? In this amazing book readers can do just that with the help of a special ship that can handle the extreme heat and pressure deep beneath Earth’s crust. Digging through a few miles of the crust is just the start of the nearly 4,000-mile journey to Earth’s core. Readers might be surprised to find that not all of the trip is through solid rock, as the intense heat does strange and amazing things to the material that makes up our planet!

Soccer has been played for over 200 years in hundreds of countries across the globe. While it doesn't always get the same level of exposure that football or basketball enjoy in the United States, professional soccer is one of the world's most popular sports. Soccer has a number of living superstars who have changed the game forever with their talents and achievements. Readers will learn about Marta, often regarded as the greatest female soccer player of all time. The inspirational story of her life, trials, and journey to greatness is sure to turn young readers into soccer fanatics.

El verdadero relato de lo que vivieron los monjes trapenses de Argelia y cómo comprendieron poco a poco el sentido de su permanencia en un lugar de amenaza de muerte en medio del diálogo y la amistad con el mundo islámico y su testimonio de entrega y martirio. Un relato en el que el autor como partícipe de los acontecimientos, nos permite captar la profundidad de la experiencia vivida por sus hermanos en la donación de sus vidas.

Simple dice " ¡huy, huy, una palabrota! " cada vez que Kléber, su hermano, echa pestes; sabe contar muy deprisa: uno, dos, tres, cuatro, B, doce...; juega con sus " playmobiles " y con los " hombrepillos " que se esconden en los teléfonos, en los despertadores y en los semáforos. Tiene tres años y tiene veintidós años. Veintidós es su edad real: Tres años, su edad mental. Kléber estudia el último curso de Bachillerato, es un chico lleno de energía, pero está muy cansado de ocuparse de Simple.