Cheat Sheet:roman numeralsHISTORY:• Originated in Ancient Rome. • The symbol represents a tally mark, which would be written into wood or dirt.• It was an easy way to keep track of events/items they were counting. • They are written as a combination of seven letters: I, V, X, L, C, D and M.• Can be written in upper and lower case.THE NUMERALS:I = 1 V = 5X = 10 L = 50 C = 100 D = 500M = 1000
The symbols are used together to make different numbers. The rule is “three up, one down.”For example, to get the number three, we use three of the lower numbers, and read them “up”. When it comes to the number four, we go “one down”, by using the symbol for five and putting a one to the left of it to signify its value is one lower than the five. IVIIII II III IV V VI VII VIII IX X→→