👉 Mug math, or "mug math," is a playful and informal method of mental arithmetic that focuses on quick calculations using basic addition, subtraction, multiplication, and division. It's often seen in casual settings, like at a coffee shop or during social gatherings, where people need to perform simple arithmetic on the fly. The technique emphasizes memorizing multiplication tables and using mental shortcuts to simplify complex calculations, such as breaking down numbers into more manageable parts or using benchmarks like 10 or 100. For example, to calculate 27 + 34, one might think of it as (20 + 7) + (10 + 30), making it easier to add the parts separately. Mug math encourages mental agility and can be surprisingly useful in everyday situations, from estimating prices to quickly tallying points in games.