How to play: The Romans wrote numbers with letters: I is 1, V is 5,
X is 10. Letters add up, biggest first: VI is 6. A small letter before a big one is
taken away: IV is 4. Tap the letters to write the number, then press Check.
Roman Numbers is a free online learning game for ages 9+. Write the number the way the Romans did, with letters. No ads, no sign-up.