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Roman Numerals and the Abacus
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When using an abacus the columns often represent nothing. Since the Romans used Roman numerals to record results, and since Roman numerals were all positive, there wasn't need for a zero.
Roman Numerals are formed by combining symbols together and adding the values. For example: MMVI is 1000 + 1000 + 5 + 1 = 2006. Generally, symbols are placed in order of value starting with the largest values. When smaller precede larger values, the smaller values are subtracted from the larger values, and the result is added to the total. For example:
MCMXLIV= 1000 + (1000 − 100) + (50 − 10) + (5 − 1) 1944
Let's continue with Roman Abacus:
It was the first portable calculating device for engineers, merchants and presumably tax collectors. It reduced the time needed to perform the basic operations of arithmetic using Roman numerals.
The Late Roman hand abacus contains seven longer and seven shorter grooves used for whole number counting, the former having up to four beads in each, and the latter having just one. The rightmost two grooves were for fractional counting. The abacus was made of a metal plate where the beads ran in slots. The size was such that it could fit in a modern shirt pocket.
Questions:
Why did in the Roman Abacus it was no needed a zero?
In which system did the Romans base their Numeric system?
What was the importance of building an Abacus?
ROMAN NUMERALS AND ABACUS
BY ANDREA
The Ancient Roman Numeric System, was based in the Latin Numeric System. Uses combinations of the Latin letters. The Roman Numeral system is decimal. And do not includes zero.
This numeral is still used in clock faces and in TV.
I, II, III, IV, V, VI, VII, VIII, IX, X
Let's start with Roman Numerals: