Multiplication on a diagonal grid

It's been a while since we've done any kind of math by hand, so please forgive our ignorance of this exercise being taught in some elementary schools: the diagonal multiplication grid. We agree with Signal vs. Noise, which finds the grid interesting but has no idea about its effectiveness over old-fashioned methods--let alone a calculator.

 

ARTICLE DISCUSSION

Conversation powered by Livefyre

Don't Miss
Hot Products
Trending on CNET

Hot on CNET

Saving your life at speed and in style

Volvo have been responsible for some of the greatest advancements in car safety. We list off the top ways they've kept you safe today, even if you don't drive one.