November 25 - 10.1: Roman Numerals Flashcards
1
Q
I
A
1
2
Q
V
A
5
3
Q
X
A
10
4
Q
L
A
50
5
Q
C
A
100
6
Q
D
A
500
7
Q
M
A
1,000
8
Q
Subtraction
A
Letter of smaller value placed before letter of larger value
ex: IV = 4
9
Q
Addition
A
Letter of smaller value placed after letter of larger value
ex: VI = 6
10
Q
Important rule for subtraction
A
The unit to be subtracted usually belongs to the next lowest category
ex:
You can’t write IL (49). You’d instead have to write XLIX (40 + 9)
1999 is written as MCMXCIX (1000 + 900 + 90 + 9)
