70 in Roman numerals
70 is written LXX. In chunks: L (50) + X (10) + X (10) = 70.
The answer
LXX
70 in Roman numerals is LXX.
How LXX is built
To write it, 70 is 7 tens and no ones, so it is just the tens: LXX. There is no zero to write.
To read it, LXX has 3 chunks, and none of them is a take-away pair, so every chunk is added.
| Chunk | Worth | Why |
|---|---|---|
| L | 50 | Add |
| X | 10 | Add |
| X | 10 | Add |
The mistake to watch for
Writing 70 as XXXXXXX
Wrong: XXXXXXX
XXXXXXX forgets L. Fifty has its own letter, and X can only be written three times in a row, so 70 is LXX.
Check it with the converter
Type XXXXXXX to see why XXXXXXX is not 70. The rule numbers it gives are the three rules on the Roman numerals page.
Converter set to LXX (70).
Keep going
Questions parents ask
What is 70 in Roman numerals?
70 is LXX.
What comes before and after LXX?
69 is LXIX and 71 is LXXI. LX stays at the front, and IX becomes X: LXIX becomes LXX.
Does LXX use subtraction?
No. Every letter in LXX is the same size as, or smaller than, the letter before it, so you just add them all.
What is the biggest letter in LXX?
L, which is 50. LXX has 3 letters.
Careful reading is an 11+ skill
Reading all 3 letters of LXX in order is the careful checking 11+ papers reward. The free diagnostic covers all four subjects, with no card needed.