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Today we would convert the equivalent of 1455 and 545 into Roman numerals as MCDLV and DXLV respectively which makes adding them together to equal MM (2000) an almost impossible task.

But the Romans probably wrote out 1455 and 545 in a simplified format as LMDV (1505-50) and VDL (550-5) which makes addition straightforward as follows:-

LMDV+VDL = MM (1455+545 = 2000)

The above numerals are simplified versions of the following expanded versions but they still too add up to MM:-

MCCCCLV+DXXXXV = MM (1455+545 = 2000)

The rules governing the Roman numeral system were probably changed during the Middle Ages presumably to make it easier to convert Roman numerals into Hindu-Arabic numerals that were being intoduced into Western Europe at the time.

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13y ago

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