Final answer:
To subtract 369 from 489 in Roman numerals, we convert them to CDLXXXIX and CCCLXIX respectively, and then subtract to get the result CXXIX.
Step-by-step explanation:
The student has asked to perform the subtraction 489 - 369 using Roman numerals. To do this, we first need to express the numbers in Roman numeral form. The number 489 is written as CDLXXXIX and 369 is written as CCCLXIX. To perform the subtraction, we take away the values of the second numeral from the first.
Subtracting Roman numerals is similar to the subtraction of Arabic numerals, but it requires understanding the values of Roman numerals and how to manipulate them. When we subtract CCCLXIX (369) from CDLXXXIX (489), we must ensure to subtract like values (C from C, X from X, and so forth). If a value from the subtrahend is larger than the corresponding value in the minuend, we must use the Roman numerals' subtractive property.
After performing the subtraction carefully, we get the result which is CXXIX, which represents the number 129 in Roman numerals.