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- The abacus is basically the worlds first mechanical calculator, and is considered a forefather of the modern computer.
- Originally the abacus dates back to between 2,700 and 2,400 BCE (over 4,000 years ago) and was developed in Sumeria. It is actually a calculating aid and not an automatic device.
- Originally it may have been used by storekeeper, traders and government officials who needed to perform basic calculations.
- The system used a number of pebbles (or beads) placed in columns on a board or attached to a string. Each column represented a multiple of 10; to to produce the number 634 you would place 6 beads in the 100's column, 3 beads in the 10's column and 4 beads in the 1's column. By adding and deducting beads you could quickly and accurately perform relatively complex calculations without having to try and keep all the numbers in your head while doing so.
- The above example is just that, an example, older civilizations did not use exactly the same counting system that we do today, some used multiples of 5, where as others used 10 basic digits.
- The abacus is still in use to day and is used to teach children the basic of mathematics, some rural areas still rely on them as they are robust, cheap and don't have batteries.

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The abacus was used for counting and helping children in mathematics.

An Abacus can be used as a calculator.

An abacus measures nothing, it is a device used for calculation

The Sumarian abacus appeared as early as 2700 BC, The ancient Egyptians and the Persians also used the abacus

The abacus was invented by the ancient Chinese people and was used to perform mostly mathematical calculations. In Japan, even to this day, the abacus is still used for simple calculations. Many people consider the abacus the first "computer" or at least the first calculator.

Thailand vegetable vendors use abacus, nowadays abacus is gaining popularity in India, US and taught by many schools

a roman abacus was used as a pocket calculator for the romans, helping them calculate roman numerals

Yes.

They used the abacus

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The abacus was originally used to add and subtract. It was much faster than an adding machine. Its weakness was that it did not leave a paper trail.

An abacus is an ancient form of the modern day calculator.

The minimum number of bars on an abacus is nine. An abacus is a calculating tool that was used before the written numeral system came into use. It is still used by merchants and traders in countries in Asia and Africa.

The Sumerian abacus appeared in 2700 BC, a primitive device which was difficult to use. The Persians used the abacus in 600 BC. The Greek abacus dated to the 5th Century BC. The Chinese dated to the 2nd Century BC

abacus was used in 300 B.C by the Babylonians. (The oldest) always the oldest from long time ago.

It was mainly used like a calculator

An abacus was used by just about every head of a family to keep the family finances. If the paterfamilia were not keen on math a slave or a wife would fill in for him. Professional record keeper, tax collectors, censors an even merchants all used the abacus.

Florida

addition subtraction multiplication and division

helped with math

beads

It is a device used for counting in ancient times

The abacus is ordinarily attributed to the Chinese, but similar counting devices are known in many different ancient cultures. The system of mathematics used with the Indo-Asian abacus is what set it apart.

An abacus is a deceptively simple calculating tool that has been used since ancient times. It is generally used by the blind to perform multiplication, addition, subtraction and division.