ROMAN NUMERALS ONLINE REFERENCE
Roman Numerals
1-10:
I is 1
II is 2
III is 3
IV Is 4
V is 5
VI is 6
VII is 7
VIII is 8
IX is 9
X is 10
If an I comes before a 5 or 10 valued number, that makes it one number value less.
Example:
IV is 4
IX is 9
XIX is 19
XXIV is 24
IL is 49
IC is 99
A similar rule applies to X coming before L, C, D, or M. This makes it 10 less than their original value.
Example:
XL is 40
XC is 90
XD is 490
CMXC is 990
Lastly, this rule applies to C before D Or M. This makes it so that it is 100 less than their original value.
Example:
CD is 400
CM Is 900
Numbers by 10 to 100
X is 10
XX is 20
XXX is 30
XL is 40
L is 50.
LX is 60
LXX is 70
LXXX is 80
XC is 90
C is 100
Numbers By 100
C is 100
CC is 200
CCC is 300
CD is 400
D is 500
Numbers by 500
D is 500
M is 1000
Highest Number
MMMCMXCIX (3,999)
Broken down:
MMM is 3,000
MMMCM is 3,900
MMMCMXC Is 3,990
MMMCMXCIX is 3,999