CDXC
CDXC
The Roman numeral CDXC represents the number 490. C (100) is subtracted from D (500) to give 400, and XC (90) is added to 400 to get 490.
XD = 490
It was the equivalent of 490 in the times of the ancient Romans but the modern way of writing 490 in Roman numerals is now CDXC
XD is not in the standard form for a Roman numeral, but I would guess its value is 490. It should be written as CDXC
cdxc 400+90
The person might have meant 490 (literally 10 before 500), but standard notation for 490 would be CDXC
On Converting between Arabic and Roman Numbers we get: 490 in roman numerals is written as : CDXC where 400=CD XC=90.
Yes and XD would mean -10+500 = 490
In todays notation of Roman numerals they represent 490
Under today's rules 490 expressed in Roman numerals is CDXC but the Romans themselves would have probably preferred XD.
490 = 490