Convert the Roman numeral CDXVI to Arabic numerals.

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Multiple Choice

Convert the Roman numeral CDXVI to Arabic numerals.

Explanation:
The essential idea is reading Roman numerals with subtractive and additive parts. In CDXVI, the pair CD uses subtractive notation: C before D means 500 minus 100, giving 400. After that, the X adds 10, and the VI adds 6. So the total is 400 + 10 + 6 = 416. If the X were not there, you’d have 400 plus 6, and if there were two X’s (XX) after the 400, you’d add 20 more, which would change the total.

The essential idea is reading Roman numerals with subtractive and additive parts. In CDXVI, the pair CD uses subtractive notation: C before D means 500 minus 100, giving 400. After that, the X adds 10, and the VI adds 6. So the total is 400 + 10 + 6 = 416. If the X were not there, you’d have 400 plus 6, and if there were two X’s (XX) after the 400, you’d add 20 more, which would change the total.

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