Master Mental Math & Take Control of Your Transactions In a world filled with constant transactions?both professional and personal?being quick with numbers can be the key to success. Whether you're negotiating deals, splitting bills, or calculating discounts, having strong mental math skills ensures you're never taken for granted or misled. Mental math isn?t as hard as you think?you?ve just been doing it the difficult way. Painless Mental Math teaches you the simplest, most practical techniques to calculate effortlessly. Learn how to handle tax, tips, discounts, weights, conversions, and measurements?all without reaching for a calculator.