Highlights fascinating facts about math, from the invention of zero to numbers too large to write out. Learn about the ancient Egyptian god that represents one million, the magic of the number 9, the infinite digits of pi, and more! Additional features include a table of contents, a phonetic glossary, an index, and sources for further research.
Introduces readers to the fundamental concepts of a twenty-dollar bill, highlights various security features, and explores its history. Additional features to aid comprehension include labeled diagrams, critical-thinking questions, fun facts, a map of where money is made, and a profile of Andrew Jackson, whose face marks the front of the twenty-dollar bill.
Introduces the history of money and discusses its development from items such as shells and furs to legal tender; features a glossary; and lists resources to explore the subject further.