M = 1,000 C = 100 X = 10 V = 5 I = 1 Read it left to right in descending order Read number, if any letter to left of any other number is smaller, then subtract. Else, just add them all together for MCMXCVIII M + (M - C) + C + V + I + I + I or 1,000 + (1,000 - 100) + (100 -10) + 5 + 1 + 1 + 1 or... 1998 - Cheers!-
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