400 (500-100)
CD = -100+500 = 400
It is: CD = 500-100 = 400
The Roman numeral for 400 is CD, which can be used to represent CDL as 450.
The Roman numerals CIC represent 199.
The roman numerals "CD" represent the number 400. It is formed by combining the symbols for 100 (C) and 500 (D) with a subtraction rule, resulting in a value of 500 - 100 = 400.
Roman numerals represent numbers, they do not represent words.
In today's notation of Roman numerals they represent 299 in Hindu-Arabic numerals
I is the number 1 in Roman numerals.
There is no T in Roman numerals
In Roman numerals C = 100 and D = 500. The numeral CD represents 100 before 500, which is 400.
1499 (m= 1000 cd= 400 xc=90 ix=9)
It is already in Roman numerals and they represent 82