How To Use An Abacus
13:33
Finger Mathematics - How to calculate Faster than a calculator Mental maths - 10
6:15
Lesson 2 - How to use the Abacus aka Soroban? Simple Addition & Subtraction Questions
9:26
How To Use An Abacus-Full Tutorial
18:40
The Abacus - Part 1
6:17
Japan's ancient secret to better cognitive memory - BBC REEL
15:04
Faster than a calculator | Arthur Benjamin | TEDxOxford
22:45
Ronaldo'yu yen, 1.000.000$ kazan
5:29