Can you Count by only using letters?
I
1
XX
20
II
2
XXX
30
III
3
XL
40
IV
4
L
50
V
5
LX
60
VI
6
LXX
70
VII
7
LXXX 80
VIII
8
XC
90
IX
9
C
100
X
10
D
M 1000
500
• A letter repeats its value that many times (XXX = 30, CC = 200, etc.). A letter
can only be repeated three times.
• If one or more letters are placed after another letter of greater value, add
that amount. Ie: VI = 6 (5 + 1 = 6)
• If a letter is placed before another letter of greater value, subtract that
amount. IV = 4 (5 – 1 = 4)
• A bar placed on top of a letter or string of letters increases the numeral's
value by 1,000 times. XV = 15,
= 15,000
Roman Numerals were
invented around 425 B.C.
By a secretive people
called the Etruscans who
vanished from history
after being conquered by
the Romans.
As
the
Romans
conquered the world
known to them, their
numeral system quickly
spread through Europe,
and
remained
the
primary manner for
representing numbers for
centuries.
Around
A.D.
1300,
Roman numerals were
replaced
throughout
most of Europe with the
more effective HinduArabic system which is
our current numerical
system.
The rules governing
today's Roman numeral
system were introduced
in the Middle Ages and
was centuries after the
decline of the Roman
Empire.
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