# Roman Numeral System

1511 WordsFeb 3, 20186 Pages
Roman Numeral System Origin: Roman numerals were created some time between 900s and 800s B.C. in ancient Rome. The Roman numerals were created as a type of counting method, which was needed for trade. Because trade was getting bigger, the Roman Numerals became a big help when they needed to add and subtract their profits and such. The Roman Numerals used to just be one symbol each. For example, I, V, X, L, C, D, M are seven symbols that were the independent symbols. I is 1, V is 5, X is 10, L is 50, C is 100, D is 500, and M is 1000. Rule: There are about four different rules that ties into the Roman numeral system. The first rule is that a letter will be repeated for the amount that it is. For example, if you had a number like 30, in Roman Numerals, it would be XXX because X is equal to 10 and there are three X’s. However, a letter can only be repeated up to three times. The second rule, for Roman Numerals, is that you must add the amount that is placed after another letter, if it is greater than the letter placed in front of it. For example, VI is equal to 6 because 5(V) plus 1(I) is 6. Another example would be MCC. MCC is 1200 because 1000(M) plus 100(C) plus 100(C) are equal to 1200. The third rule is that a letter must be subtracted if it is placed before another letter with greater value. For example, IV is equal to 4 because 5(V) minus 1(I) equals 4. There are actually more rules for subtracting the amounts of Roman Numerals. You can only subtract powers of ten like