""A Key to Butler's Edition of Walkingame's Tutor's Companion: Or Complete Practical Arithmetic"" is a comprehensive guide to the practical application of arithmetic, written by Francis Walkingame. The book serves as a companion to Walkingame's original arithmetic textbook, providing step-by-step solutions to the problems presented in the main text. The key is designed to be used by teachers and students alike, offering clear explanations and examples...