This book explores in an easy flowing reading style, a fun, little known principle at the heart of our number system that at first amazes anyone that comes across it and raises profound questions and answers about what makes a number a number. From there, the author takes the reader on a guided tour of how this amazing principle can be used to ensure that the reader never again makes a simple mistake in a math problem using a simple process that's easier to do than the math we all know. This book is a must read for anyone that wants to improve the accuracy of their math or has wondered why numbers work the way they do.