Why to Learn Abacus ? | What Is Abacus ? | How does it help to calculate faster ? | Abacus a Scientific Calculation Method | Know about Abacus | History of Abacus .
Abacus is an ancient Chinese method for calculation ... It is more than 2000 yrs old art & skill. Abacus is still widely used in several countries . It is proven technique for the brain development .