✅ The Latin alphabet was used to mark these numbers: I = 1 (Latin unus, unum — one), V = 5 (Latin quinque — five), X = 10 (Latin decem — ten), L = 50 (Latin quinquaginta — fifty), C = 100 (Latin centum — one hundred), D = 500 (Latin quingenti — five hundred), M = 1,000 (Latin mille — one thousand). XXIV.

✅ To make a number in between, you have to add a few letters on the right or left. For example, 24 is XXIV.

✅ To make 1,000, you draw a horizontal line at the top.

✅ If a bigger number is placed before a smaller one, you put them together, and if a smaller one goes before a bigger one, you subtract it. This method was used to avoid repeating the same number 4 times. For example, if you need 9, 90, and 900, you put I, Х, С before Х, С, М. If you need 4, 40, and 400, you put I, Х, С before V, L, D.

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