How 1987 breaks down

Roman numerals are additive from left to right (with subtractive pairs like IV=4 and CM=900). MCMLXXXVII decomposes as: M = 1000 + CM = 900 + L = 50 + X = 10 + X = 10 + X = 10 + V = 5 + I = 1 + I = 1 = 1987.

Nearby numbers

Number	Roman numeral
1983	MCMLXXXIII
1984	MCMLXXXIV
1985	MCMLXXXV
1986	MCMLXXXVI
1987	MCMLXXXVII
1988	MCMLXXXVIII
1989	MCMLXXXIX
1990	MCMXC
1991	MCMXCI

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