I saw a video where Indian kids where fiddling fingers in the air and working out big sums. WOW I thought.

I researched loads and have figured out that it's all based on using the Soroban Abacus (a Japanese abacus if you don't know).

I got a little program on my Android phone and have mastered using the Soroban Abacus.

**BUT** the bit I am missing is how they keep the abacus mentally pictured in their heads??

I'm sure I could try to remember myself and keep in my head - but I'm assuming there is some methodology behind how the kids do it.

These little kids seemed to be on over drive adding about 10 2 digit numbers in lightning speed. Old kids did even better.

Anyone know?

Thanks

Omar