👉 Mental math involves performing calculations in one's head without the aid of calculators or paper. It relies on a deep understanding of numbers, patterns, and basic arithmetic operations like addition, subtraction, multiplication, and division. For instance, to quickly calculate 27 x 4 mentally, one could break it down into (20 + 7) x 4, using the distributive property to get 400 + 140, which sums up to 540. This technique leverages familiar numbers and their relationships to simplify complex calculations, making mental math a powerful tool for everyday problem-solving.
