It is: CD = 500-100 = 400
CD = 400
CD = 400
XL=400 * * * * * No. XL is the Roman number 40. 400 is CD.
400
CD
If you mean CD plus DC then in Roman numerals they add up to M meaning 400 plus 600 = 1000
400 = CD
CD
CD = -100+500 = 400
CD-D
400 (500-100)
In Roman numerals, CD represents the number 400 and XX represents the number 20. When you divide 400 by 20, you get 20. Therefore, CD divided by XX equals XX in Roman numerals.