This article Boost your mental math speed and accuracy with these effective abacus tricks. This practical guide explains fundamental techniques like direct addition and subtraction using complements ...

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.

Being a true blue numbers geek, I am constantly on the lookout for ways to keep the tip of my mechanical pencil on the proverbial scratch paper of life now that my career as a molder of young ...