Students in some local elementary schools are learning a completely different way of doing multiplication. It’s a technique that many parents can’t understand. It’s called lattice multiplication. The ...

Emily Long is a freelance writer based in Salt Lake City. After graduating from Duke University, she spent several years reporting on the federal workforce for Government Executive, a publication of ...

Numberphile revived an ancient multiplication trick—halves and doubles—also called Egyptian or Russian math, where you repeatedly halve one number and double the other. After crossing out rows with ...

When I first saw this Japanese multiplication method, I just couldn’t believe it. Then I tried it and it works perfectly, but still can’t understand how it works—or how anyone found this method. You ...