Q: What is 400 as a Roman Numeral?

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CD is the Roman numeral for 400.

400 = CD

CD

The Roman numeral for 497 is CDXCVII.

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

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CD is the Roman numeral for 400.

400

400 = CD

CD = 400

CD

The Roman numeral for 497 is CDXCVII.

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

Converting between Arabic and Roman Numbers we get,roman numeral CD in standard form is written as 400. CD=400.

((CD)) = 10*1000*400 = 4,000,000

it would equal 400 but it is the incorrect way of writing 400. the way of writing 400 is CD

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.

If you ment one and 400, it's I and CD. If you ment 1,400, it's MCD