Number to Roman Numerals

1. What is the Roman numeral for the number 50?

The Roman numeral for the number 50 is L.

2. How do you convert the number 1987 to Roman numerals?

To convert the number 1987 to Roman numerals, you break it down into its component parts:

• 1000 = M
• 900 = CM
• 80 = LXXX
• 7 = VII

Putting these together, 1987 in Roman numerals is MCMLXXXVII.

3. Why is 4 written as IV in Roman numerals and not IIII?

In Roman numerals, 4 is written as IV instead of IIII because Roman numerals follow a subtractive principle. This means that placing a smaller numeral before a larger numeral indicates subtraction. Therefore, IV means 5 - 1 = 4.

4. What are the rules for writing Roman numerals?

The main rules for writing Roman numerals are:

1. Additive Combination: Numerals are added together to form the number (e.g., VI = 5 + 1 = 6).
2. Subtractive Notation: When a smaller numeral precedes a larger numeral, it is subtracted (e.g., IV = 5 - 1 = 4).
3. Repetition: A numeral can be repeated up to three times to increase its value (e.g., III = 3).
4. Order: Numerals are generally written from largest to smallest from left to right (e.g., XVI = 16).

5. How would you represent the number 1000 in Roman numerals?

The number 1000 is represented in Roman numerals as M.