The Youth's Assistant in Theoretic and Practical Arithmetic, written by Zadock Thompson and originally published in 1826, is a comprehensive guide for young students learning arithmetic. The book is divided into two parts: the first part covers the theoretical aspects of arithmetic, including number notation, fractions, decimals, and the principles of arithmetic. The second part focuses on practical applications of arithmetic, such as calculating interest, currency conversion, and measurements of length, weight, and volume. The book is written in a clear and concise style, with numerous examples and exercises to help students understand and apply the concepts presented. The author also includes practical tips and tricks for mental calculation, as well as advice on how to avoid common errors. Overall, The Youth's Assistant in Theoretic and Practical Arithmetic is a valuable resource for young students learning arithmetic, as well as for anyone seeking to improve their mathematical skills. It is a timeless classic that has been used by generations of students and teachers alike, and continues to be relevant today.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.