You write them: I, II, III, IV, V, VI, VII, VIII, IX, X, XI, XII, XIII, XIV, XV, XVI, XVII, XVIII, XIX, XX.
The Roman numeral representation for 1 is 'I'.
1 in roman numerals is written as I.
1.5 = IS in Roman numerals because 1= I and 0.5 = S
In todays notation of Roman numerals: VIII-I-MCMXLVII
4 in Roman numerals can be IIII (4) or IV (5-1)
The Roman numeral representation for 1 is 'I'.
1 in roman numerals is written as I.
1.5 = IS in Roman numerals because 1= I and 0.5 = S
In todays notation of Roman numerals: VIII-I-MCMXLVII
4 in Roman numerals can be IIII (4) or IV (5-1)
I/i/mmxi
They are: I and LX respectively
The number 121 written as a Roman numeral is CXXI
In the same order as asked, "MCMLXXVII/I/I" The "/" is just to separate, and is not to deal with the roman numerals in any way.
In todays notation of Roman numerals: MMDXCIX But in the times of the Romans it probably was: IMMDC (2600-1)
To write the date in Roman numerals, you would convert the numbers in the date to their Roman numeral equivalents. For example, January 1, 2022 would be written as I.I.MMXXII.
I.XX.XII or I.XX.MMXII