When a smaller letter precedes a bigger letter, the letters are subtracted.For example: DI, D > I, so DI = D + I = 500 + 1 = 501. When a bigger letter precedes a smaller letter, the letters are added.These rules are explained here in detail. ☛ Also Check: Roman Numerals Calculator Rules to Write Roman Numerals from 1 to 20Ĭertain rules are to be followed while writing roman numbers from 1 to 20. Method 2: In this method, we consider the groups of numbers for addition such as: 18 = 10 + 8 = X + VIII = XVIIIĪny of the above two methods can be used for writing Roman Numerals from 1 to 20.Method 1: In this method, we break 18 into the least expandable form, write their respective roman letter and add/ subtract them, i.e.Roman numerals 1 to 20 can be obtained by using any of the two given below methods:
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