It is: CD = 500-100 => 400 and in standard form or scientific notation is 4.0*10^2
Converting between Arabic and Roman Numbers we get,roman numeral CD in standard form is written as 400. CD=400.
CD = 400
M=1000, CD =400, XC=90, II=2 so MCDXCII is 1492
1000 : M 400 : CD 90 : XC 2 : II Accordingly, 1492 : MCDXCII
CD is the Roman numeral for 400.
The standard numeral is 9,000,000,000,000
400
CD
The Roman numeral for LXVI II is LXVIII.
As a Roman numeral ii or II is equivalent to 2
CD