How are Roman numerals

The Roman numeral system comes from ancient Rome and was used throughout its empire, expanding beyond later. It is a non-positional numbering system, in which some uppercase letters are used as symbols to represent the numbers. We can often see written dates like that. Learn here how to interpret this numbering prior to the decimal, currently used.

Steps to follow:

one

The basic numbering with which the different combinations are then made to obtain all the numbers is as follows: I - Equivalent to 1V- Equivalent to 5X- Equivalent to 10L - Equivalent to 50C - Equivalent to 100D - Equivalent to 500M - Equivalent to 1000

two

From here, there are certain "rules" to be taken into account so as not to make mistakes when placing the letters. As a general rule, symbols are written and read from left to right, from highest to lowest value.

3

Normally, the value of a number is obtained by adding the values of the symbols that compose it, but if a symbol is to the immediate left of another of greater value, the value of the second is subtracted from the value of the first. Ex IV = 4, IX = 9. Thus: - the symbol I can only subtract V and X.- the symbol X only subtracts L and C.- the symbol C only subtracts D and M.

4

Also, two different symbols are allowed to appear subtracting if they are not adjacent. eg: XCIV = 94In addition, there may be at most three consecutive repetitions of the same symbol. ex: III and IV. No IIII (although exceptions are sometimes seen).

5

Finally, as a fundamental rule, there is also the fact that for numbers equal to or greater than 4, 000, a horizontal line is placed above the number to indicate that it is multiplied by a thousand. eg: V + superior rallite (as if it were a triangle but not completely closed).

6

A good example to practice everything learned with Roman numerals is the number, 632. The first doubt that assaults us is Can I use the M here? I can not because it has a value of one thousand, and the number 632 is smaller.

So, we use the D that has a value of five hundred, and I add a C that has a value of one hundred.