Number
980 in Roman numerals
980 is written CMLXXX
Type any other number or numeral below to convert it.
Above 3,999? Type the barred part in brackets, e.g. (IV)CC = 4,200.
How CMLXXX is built
Roman numerals are written one decimal place at a time, largest first.
- CMhundreds · 9C before M means 1,000 − 100 = 900. This saves writing DCCCC.
- LXXXtens · 8L (50) plus XXX (30) makes 80.
900 + 80 = 980
The pair CM uses subtraction: a smaller letter before a larger one is taken away from it. Only six pairs work this way: IV, IX, XL, XC, CD and CM. More on subtraction
Mistakes to avoid
- Not LMXXX. It looks like a shortcut, but L is never written before a larger letter to subtract. The correct form is CMLXXX.
- Not DCCCCLXXX (9 letters). That adds everything up without subtraction. The Romans sometimes wrote numbers this way, and clocks still show 4 as IIII, but today CMLXXX (6 letters) is the standard.
- There's no letter for zero. The zero is simply left out, which is why 980 has 2 parts, not 3.
About the number 980
- 980 is even and can be split into prime factors: 2 × 2 × 5 × 7 × 7, or in Roman numerals II × II × V × VII × VII.
- CMLXXX has 6 letters. 396 of the numbers up to 1,000 have longer numerals.
Counting from 971 to 980
Every number from 971 to 980 starts CMLXX (970); only the ending changes.
| Number | Roman numeral |
|---|---|
| 971 | CMLXXI |
| 972 | CMLXXII |
| 973 | CMLXXIII |
| 974 | CMLXXIV |
| 975 | CMLXXV |
| 976 | CMLXXVI |
| 977 | CMLXXVII |
| 978 | CMLXXVIII |
| 979 | CMLXXIX |
| 980 | CMLXXX |