Hey guys, Caroline the Line here! I was asked to explain what Roman numerals were, so here we go!
Roman numerals are a special way of writing numbers that people used a long time ago, in ancient Rome.

They use letters instead of numbers to show the value of something.

To write a number using Roman numerals, you put the letters together in a special way. You start with big numbers and make your way to the end. For example if we want to write the number 1125 we would do the following, each numeral added to the previous ones:
Start with M for 1000, add a C for 100, two Xs to make 20, and end with a V for 5:
1125 = 1000 + 100 + 20 + 5 = M + C + X + X + V = MCXXV
There’s one more trick to learn about Roman numerals – when a symbol of a smaller value appears before a symbol of greater value, it will be subtracted from it:
For Example: IV = V – I = 5 – 1 = 4.