Roman Numerals — Answer Key
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
The Roman numeral V stands for 10.
Corrected: The Roman numeral V stands for 5.
V always equals five, while X equals ten in Roman numeral notation.
2. Fix the sentence:
We write the number 3 as IIV.
Corrected: We write the number 3 as III.
Numbers under four stack I marks; subtraction shapes like IIV are not valid Roman forms.
3. Fix the sentence:
The symbol L is worth 100 in Roman numerals.
Corrected: The symbol L is worth 50 in Roman numerals.
L stands for fifty, and C stands for one hundred in standard Roman numerals.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. The Roman numeral X equals 10 in standard form.
X is the Roman symbol for ten, one of the seven core letters.
2. Write the number five as the Roman numeral V.
V represents five and forms the base of letters like IV and VI.
3. Read aloud: II equals 2 in our numbers.
Stacking I symbols up to three times means simple addition: I plus I equals two.
4. The Roman numeral C is equal to 100.
C represents one hundred, the largest two-digit value among Roman base symbols.
Part C: Short Answer
Answer each question in one or two complete sentences.
1. Name three Roman numeral symbols and their values.
Sample answer: I equals 1, V equals 5, and X equals 10 in Roman numerals.
Knowing the first symbols by heart makes longer Roman numerals easier to read.
2. Why do we write 3 as III instead of IIV?
Sample answer: We stack up to three I marks for small numbers; IIV is not a real Roman pattern.
Roman rules allow repeating I, X, C up to three times before switching to subtraction.