This engrossing guide to the number system and fractions combines the history of math with its practical applications, making the story of math engaging for all readers. Both the number system and computations with fractions constitute important elements of the Common Core mathematical standards for grades 68, and in this text, theory and practice combine, giving students an excellent approach to both fields. Sample problems are couched in the stories of the mathematicians and great societies that developed these areas of study—proving riveting for even those who typically shy away from math.