That was the same way that it is today which is CDLII (452 in Roman numerals).
CDLII = 452.
CDLII
CCCCLIImproved answer:CDLII (-100+500+50+1+1 = 452)
452 = CDLII
452 is a composite number
CDLII
CDLII
They are CDLII and MMXII respectively
When rounding 452 to the nearest whole number, you look at the digit in the ones place, which is 2. Since 2 is less than 5, you would round down to 452. Therefore, 452 rounded to the nearest whole number remains 452.
731 - 452 = 279
100 less than 452
452