""Commercial Affairs, Sixth Book: Elementary School Mathematics By Grades"" is a textbook written by William Estabrook Chancellor and published in 1902. The book is designed for elementary school students and focuses on mathematics related to commercial affairs. It is the sixth book in the series and covers topics such as fractions, decimals, percentages, interest, and taxes. The book includes numerous examples and exercises to help students understand and apply the concepts. The goal of the book is to provide students with a practical understanding of mathematics that they can use in their future careers in business and commerce. Overall, ""Commercial Affairs, Sixth Book: Elementary School Mathematics By Grades"" is a valuable resource for students and teachers looking to improve their math skills and knowledge in the context of commercial affairs.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.