Unlike Esa Helttula's other apps, which allow kids to practice specific skills through a no-nonsense kind of interface, Esa's latest app, for the iPad, gives kids a playground of sorts to play around ...

Of all the numbers that you can be tasked with multiplying, the number nine always seems like one of the more tricky numbers to wrap your head around. Maybe it’s because it’s a larger number to work ...

KASHIHARA, Nara -- A wooden tablet unearthed in 2001 from the ruins of Japan's late seventh to early eighth century capital Fujiwara-kyo here was part of a multiplication table chart used by ...

Q: How much is 230 times 10? A: The number of years humans have been calculating with decimals. A crack team of scholars in Beijing learned this last year when they solved a 23-centuries-old puzzle.