In todays notation of Roman numerals they are as follows:-
Uniits from1 to 9: I, II, III, IV, V, VI, VII, VIII and IX
Tens from 10 to 90: X, XX, XXX, XL, L, LX, LXX, LXXX and XC
400 and 500: CD and D
To choose any numerals simply write them out in descending order as for example 499 = CDXCIX
Note that the way we work out Roman numerals today differs in many respects to how the Romans actually did themselves for instance they would have worked out the equivalent of 499 on an abacus counting device as CCCCLXXXXVIIII and then probably simplified it to ID (500-1) in written format.
QED by David Gambell
Wiki User
∙ 11y agoCD in roman numerals is equivalent to 400.
CD-D
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.
400(CD) = 500(D) - 100(C) In Romn numerals if ther lesser value is shown to the left of the greater, then it means subtract.
421 D=500 so CD = 500-100 = 400
CD in roman numerals is equivalent to 400.
CD-D
400 (500-100)
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.
400(CD) = 500(D) - 100(C) In Romn numerals if ther lesser value is shown to the left of the greater, then it means subtract.
421 D=500 so CD = 500-100 = 400
400 in roman numerals is CD C=100 and because it come before D (D=500) you would subtract the 100 from the 500 and make 400 which is in roman numerals is CD
CD = -100+500 = 400
"D" in Roman Numerals equals 500.
This is tricky because 400 is shown as 500 minus 100. And 50 is going to be L. CDLIV is the way to write it in Roman Numerals.
XVXVXAnother answer:400 in Roman numerals is CD (-100+500 = 400) but 100-1400=400 still because the numeral ups one after subtraction so actually(-100+500 = 400) doesn't exist
D is 500 in Roman Numerals.