A Complete System of Mental Arithmetic: Embracing Every Variety of Commercial Calculation Necessary for the Counting-House and Shop

Improve your mental math skills with this comprehensive guide to arithmetic. James Ferguson covers addition, subtraction, multiplication, and division using a variety of techniques. With practice problems and detailed explanations, readers will gain the skills and confidence needed to solve complex math problems in their heads. This book is an essential resource for students and anyone looking to improve their math skills.