MENTAL MATH. From Ancient Coins to Crypto (en Inglés) - Harry Lima

Mental Math: From Ancient Coins to Crypto will train your brain to see patterns, solve problems, and handle numbers with ease, without paper, pencil, or a calculator.

Numbers are everywhere in daily life: from checking the time and splitting a restaurant bill, to figuring out discounts, loans, or the value of digital money. Mental Math is faster, clearer, and more powerful than you think.

Through stories, real-world examples, and simple strategies, this book takes you on a journey across the history and future of numbers. The journey from ancient coins to modern crypto shows us one truth: math has always been the language of trust, trade, and progress. And with this book, you’ll finally master it, in your mind.