How to handle the abacus and position of pencil

Most important thing is to handle the abacus and position of pencil.
Always use your both hands
There are five pointers
middle point is called unit point
upper bead value is 5 and lower bead value is 1 each.
1,2,3,4 add with your thumb and 1,2,3,4 subtract with your index finger.
5 add and subtract with your index finger.
6,7,8,9 pinch together for addition.
6,7,8,9 move away for subtraction.
I am giving you link of abacus introduction
• ABACUS introduction
Why its important
• why ABACUS is importan...