These Mental Math techniques can be applied to everyday situations such as mentally estimating a grocery bill, calculating the tip at a restaurant, and more.
Quick: What's 25 × 45? How about 742 × 300? Or 4821 ÷ 9? Most of us, when faced with math problems like these, immediately reach for a calculator or a pen. But imagine if you could perform these and other seemingly difficult—but surprisingly easy—calculations right in your head. Seems like an impossible feat? It's not.