Problem 72 If you are interpreting a Roman ... [FREE SOLUTION]

Chapter 4: Problem 72

If you are interpreting a Roman numeral, when do you add values and when do you subtract them? Give an example to illustrate each case.

Short Answer

Expert verified

Roman numerals are added together when a numeral is followed by one of the same or a smaller value, and subtracted when a numeral is followed by one of a bigger value. For example, XVIII equals to 18 (10+5+1+1+1) and IV equals 4 (5-1).

Step by step solution

Understanding Roman Numerals

Roman Numerals use seven letters: I, V, X, L, C, D and M. Each letter stands for a number: I for 1, V for 5, X for 10, L for 50, C for 100, D for 500, M for 1000. The value of a Roman numeral is the sum of the values of its components or letters, unless a smaller numeral appears before a larger one, in which case the smaller numeral is subtracted from the larger numeral.

When to Add or Subtract Values

There are two simple rules to follow: 1. If a numeral is followed by one of the same or a smaller value, the two numerals are added together. 2. If a numeral is followed by one of a bigger value, the smaller numeral is subtracted from the bigger numeral.

Providing Examples

Here are some examples: For Addition, take the Roman numeral XVIII. This is equivalent to 10 (X) + 5 (V) + 1 (I) + 1 (I) + 1 (I) = 18. For Subtraction, consider the Roman numeral IV. This is equivalent to 5 (V) - 1 (I) = 4.

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91影视

If you are interpreting a Roman numeral, when do you add values and when do you subtract them? Give an example to illustrate each case.

Short Answer

Step by step solution

Understanding Roman Numerals

When to Add or Subtract Values

Providing Examples

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