The abacus is a mathemetical instrument used to calculate. It can do anything from addition ,maltiplicaiton, division, subtraction to calculating fractions. It is an ancient Chinese instrument used in shops for billing. Today there are many classes to teach children about the abacus and how it functions. Many adults too have found their intrests lying here and decide to work on this for their career. There are international, national, state, district, city, institution level competitions in which about a thousand student will participate. Believe me it is great fun.
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People realized that they could only count so high with their fingers and toes, so the abacus was invented as an early calculator.
It was an abacus counting device
The Chinese abacus
Abacus was invented by the Chinesethe abacus was also known as the first computer