How to Use Abacus
Numbers are set by moving beads towards the bar and numbers are removed by moving beads away from the bar. Abacus is operated by using any one hand thumb finger and index fingers only.
In putting a number on the abacus, you set or enter it. In taking a number away, you remove or clear it. In setting and removing a number, you correctly use your thumb and forefinger in the following ways.
How to Operate Abacus
Beads are moved in following way, bottom bead (ones units)
Upward (towards the bar) - with thumb to set numbers figure (A)
Downward (away from bar) - with forefinger to remove numbers figure (B)
Beads are moved in following way, top bead
Downward (towards the bar) - with forefinger to set number five
Upward (away from the bar) - with forefinger to remove number five
Beads are moved in following way, top & bottom beads
For setting and removing numbers from 06 (six) to 09 (nine), both the fingers thumb and index fingers are used together like a pinch as shown in figures. When both top and bottom beads are required to be moved, simultaneously they are taken or‘pinched’ between the thumb and forefinger e.g. to set numbers (6 to 9)
To set number '6' enter a 05 (five) - unit counter with the forefinger and a 01 (one) - unit counter with the thumb at the same time as shown in figure (E), as if pinching them.
To remove numbers '6' first move down a 01 (one) - unit counter with the forefinger as shown in figure (F), Next move up a 05 (five) - unit counter with the forefinger as shown in Figure (G)