Elementary students around the globe are taught to count using a base-10 number system. We form numbers using the 10 digits of our base-10 system zero through nine. Inside this book, readers discover other number systems people have used throughout history. With a binary system, computers only use two digits 0 and 1. So how does a computer count to 10? Readers will learn the answer inside this book. Also included is a review of hexadecimal numbers,...