FORT LEE — For 10 seconds, a series of 50 random three-digit numbers flashed on the screen. After another second, abacus master Jeonghee Lee announced she'd finished the mental addition, correctly ...

The method that we learn in school is a long multiplication method. But this method is very time consuming. SO let’s learn a much faster way to multiply a 2-digit number by 11. Step 1 - Write 3 and 6 ...

San Diego Skeptic Society presents Arthur Benjamin, the Smallwood Family Professor of Mathematics at Harvey Mudd College in Claremont, California. Dr. Benjamin will demonstrate how to mentally add and ...

Ever dreamt of solving math problems in your head with the speed of a calculator? Mental math might seem challenging, but it's a skill attainable through the right tools and techniques. The abacus, an ...

Calculators are awesome, but they’re not always handy. More to the point, no one wants to be seen reaching for the calculator on their mobile phone when it’s time to figure out a 15 percent gratuity.

Converting between kilometers and miles becomes effortless with these mental math tricks. Learn to quickly estimate distances for everyday scenarios, from understanding international content to ...

For mathematician and "mathemagician" Arthur Benjamin, the best way to illustrate the basic concept of algebra is with a little magic trick: "Think of a number between one and ten. Now, double it. Add ...