How to become a lightning calculator

"How to Become a Lightning Calculator" by Anonymous concentrates on different ways to boost your math skills. This straightforward manual, possibly from the late 1800s, provides techniques and shortcuts for doing math in your head more quickly and accurately. The book shows different strategies for adding, subtracting, multiplying, and dividing, all created to help you calculate faster and more precisely. It goes over how to rapidly add numbers, including how to deal with numbers that repeat and adding columns at the same time. Also, it explains how to multiply numbers easily, figure out interest, give the right change, and understand discounts, with examples to help you understand. By the end, this guide will equip readers with the skills to do math really fast, almost like a "lightning calculator."