At One Place

988 in Roman numerals

988 in Roman numerals
CMLXXXVIII

988 is written CMLXXXVIII in Roman numerals. That is 9 symbol groups added together, reading left to right from the largest value down.

How it breaks down

CMLXXXVIII = 900 + 50 + 10 + 10 + 10 + 5 + 1 + 1 + 1 = 988
Group Value Subtraction Running total
CM 900 M − C 900
L 50 — 950
X 10 — 960
X 10 — 970
X 10 — 980
V 5 — 985
I 1 — 986
I 1 — 987
I 1 — 988

Why the smaller symbol comes first

CMLXXXVIII uses subtractive notation in one place: CM means M minus C, or 900. A smaller symbol placed before a larger one is subtracted from it rather than added, which is why IX is nine and not eleven.

Only six such pairs are valid — IV, IX, XL, XC, CD and CM. That restriction is what makes the notation unambiguous: IIII and IC both look like they should work, but neither is standard, and only one spelling of any number is correct.

The symbols

Symbol Value Used here
I 1 yes — 3×
V 5 yes — 1×
X 10 yes — 3×
L 50 yes — 1×
C 100 yes — 1×
D 500 no
M 1,000 yes — 1×

The same number, other ways

In words
Nine hundred eighty-eight
Roman numeral
CMLXXXVIII
Symbol count
10 characters
Binary
1111011100
Hexadecimal
3DC

The numbers either side

Number Roman numeral
986 CMLXXXVI
987 CMLXXXVII
988 CMLXXXVIII ←
989 CMLXXXIX
990 CMXC

Common questions

What is 988 in Roman numerals?
988 is CMLXXXVIII.
What does CMLXXXVIII mean?
CMLXXXVIII is the Roman numeral for 988 — 900 + 50 + 10 + 10 + 10 + 5 + 1 + 1 + 1.
How do you write 988 in Roman numerals?
Take the largest value that fits and repeat until nothing is left: CM (900), then L (50), then X (10), then X (10), then X (10), then V (5), then I (1), then I (1), then I (1). That gives CMLXXXVIII.

Related pages

Sources

  1. Calculated on this page — At One Place

How these figures are compiled and checked