![]() ![]() When you remember to consider a number broken down as ones, tens, hundreds and thousands, you will see that writing 99 as IC shows that the number was considered as ones and hundreds, omitting the tens.) It is tempting to think of 99 as one less than one hundred and write it as IC, but it is incorrect thinking. The number 99 must be considered as 90+9 ( ten less than 10 0+ one less than ten) which is written as XCIX. (It is easier to think of the number broken down as ones, tens, hundreds, and thousands.) For example, consider the number 2317 as 2000+300+10+7 which is written as MMCCCXVII.įor numbers that include a 4 or a 9, subtractive rules apply, so writing 1952 would be considered as 1000+(100 less than 1000)+50+2 which is written MCMLII. When converting a number into roman numerals, write it from left to right beginning with the highest number and working across. The same applies to the number 9, which is thought of as one less than ten or IX. Subtractive rules apply in order to achieve the number 4, which is thought of as one less than five or IV. The number three is written as III (I+I+I), the number 32 is written as XXXII (X+X+X+I+I). In present day, no more that three of the same numerals are written consecutively. ![]() ![]() Roman numerals are based, primarily, on a series of additions. Based on the rules of roman numerals noted below, ivi cannot represent a number as it is impossible to have the "I" come before and after the "V" in the same numeral. ![]()
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