Roman numerals to 1000
Read Roman numerals to 1000 (M) and recognise years written in Roman numerals
What a learner can do afterwards
- Read MCMXCIX as 1999
- Write 2024 in Roman numerals (MMXXIV)
- Explain the subtractive principle: IV = 4 not IIII
The lesson
You already know I, V, X, L, and C for numbers up to 100. Two new symbols take you all the way to 1000. D stands for 500. M stands for 1000, the biggest number Roman numerals usually need.
Look at MCMXCIX. Split it into chunks from left to right: M (1000), CM (900), XC (90), IX (9). Add the chunks: 1000 + 900 + 90 + 9 = 1999.
The year 2024 splits into MM (2000), XX (20), and IV (4). Put the chunks together: MMXXIV.
When a numeral looks long, don't worry. Split it into chunks for thousands, hundreds, tens, and ones, then add each chunk using what you already know.
D is 500, M is 1000, and any Roman year breaks into thousands, hundreds, tens, and ones chunks that add together.
Watch it
Where it sits
Learn first
This opens up
Nothing builds on it yet.
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.