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THE ABACUS



 

 This frame shows ONE                                            This frame shows TWO
 

Below the crossbar, beads are worth (right to left): 1, 10, 1000; above the bar, 5, 50, 500, 5000.
The beads moved to the crossbar form the total at the right.



 
 

     This frame shows SEVEN                                      This frame shows FOURTEEN



 
This frame shows TWENTY SEVEN
This frame shows 345