Explanation of the Roman Numeral MCMXXX

"MCMXXX" is a Roman numeral that represents the year 1930 in the Gregorian calendar.

Here's a breakdown of how the Roman numeral "MCMXXX" is constructed:

• The first symbol, "M", represents 1000.
• The next symbol, "CM", represents 900. This is because "C" (100) is placed before "M" (1000) and subtracted from it, leaving 900.
• The third symbol, "XXX", represents 30. This is because "X" (10) is repeated three times to get 30.

So altogether, "MCMXXX" represents 1000 + 900 + 30 = 1930.

Before the adoption of the Arabic numeral system, Roman numerals were widely used, particularly in the Roman Empire and throughout medieval Europe.