CAN YOU READ AN ABACUS?
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Exercise A: What value (number) does this setting below represent?


Exercise B: What value (number does this setting below represent?


Exercise C: We have subtracted 305 from the above example...
Now what value does this setting below represent?

Answers

Note: To subtract the 305 from 822 (the examples above), we first subtracted three 100 unit beads by pulling them away from the center, then we attempted to take away one 5 unit bead, but there were no 5 unit beads available, so we temporarily subtracted one 10 unit bead and added two 5 unit beads to compensate for this temporary condition. We were then able to subtract the one 5 unit bead to finish up our calculation. After this work, we simple read the answer from left to right.


 

 

 

 

 

 


 ANSWERS:
Exercise A: 17
Exercise B: 822
Exercise C: 517

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