Roman Numerals Flashcards
Who invented Roman Numerals and when
The Romans about 900 bc
How many years ago were Roman Numerals invented?
900bc 500 bc 100bc 0 500ad 1000ad 1500ad 2000ad
2019 years + 900 years = 2919 years ago
In Roman Numerals, what is
I ?
1
In Roman Numerals, what is
X ?
10
In Roman Numerals, what is
C ?
100
In Roman Numerals, what is
M ?
1000
In Roman Numerals, what is
V ?
5
In Roman Numerals, what is
L ?
50
In Roman Numerals, what is
D ?
500
Which two numbers are written differently? Why?
9s and 4s - they are written as subtractions instead of additions.
IV (1-5) = 4
XL (10-5) = 40
What is:
CD ?
500 - 100 = 400
What is:
IX ?
10 - 1 = 9
How do you make 90 in Roman Numerals?
XC = 90 (100-10)
We don’t use Roman Numerals much except for the year.
What is the year 2019 and 1584 in Roman Numerals?
MMXIX
MDLXXX1V
What are these numbers in Roman Numerals?
63 ?
LXIII
