Notwithstanding today's notation of Roman numerals the numbers of 19, 49, 99 and 499 would have probably been notated as IXX, IL, IC and ID respectively during the Roman era which makes addition straightforward as follows:-
IXX+IL = IILXX (68)
IILXX+IC = CLXVII (167)
CLXVII+ID = DCLXVI (666)
When writing out Roman numerals use the least amount of numerals whenever possible
Roman numerals:IX*IX = LXXXILXXXI/III = XXVIIXXVII+LXXIII = LXXXXVIIIII => CArabic numerals:9*9 = 8181/3 = 2727+73 = 100
When converted into Roman numerals the numbers of 168, 199, 1409 and 223 can be expressed as CLXVIII, CLXXXXVIIII, MCCCCVIIII and CCXXIII respectively which makes addition straightforward as follows:- CLXVIII+CLXXXXVIIII = CCCLXVII (367) CCCLXVII+MCCCCVIIII = MDCCLXXVI (1776) MDCCLXXVI+CCXXIII = MDCCCCLXXXXVIIII (1999) The Romans would have used an abacus counting device to add up the above numerals and probably simplified the equivalent of 1999 to IMM in written form.
Save yourself the trouble and convert the numbers to arabic numbers (the numbers we usually use).
taking or showing extreme care about minute details
expanded form
Roman numerals:IX*IX = LXXXILXXXI/III = XXVIIXXVII+LXXIII = LXXXXVIIIII => CArabic numerals:9*9 = 8181/3 = 2727+73 = 100
When converted into Roman numerals the numbers of 168, 199, 1409 and 223 can be expressed as CLXVIII, CLXXXXVIIII, MCCCCVIIII and CCXXIII respectively which makes addition straightforward as follows:- CLXVIII+CLXXXXVIIII = CCCLXVII (367) CCCLXVII+MCCCCVIIII = MDCCLXXVI (1776) MDCCLXXVI+CCXXIII = MDCCCCLXXXXVIIII (1999) The Romans would have used an abacus counting device to add up the above numerals and probably simplified the equivalent of 1999 to IMM in written form.
Impressionism avoided showing many details.
Because the Latin language is still used today and Roman numerals are in fact Latin numerals. Roman numerals are most often used to represent the year of a date in a more formal way, for example when they show the year in the end credits of a movie, or when showing ordinal numbers, like the third, fourth, fifth of something, etc.
Save yourself the trouble and convert the numbers to arabic numbers (the numbers we usually use).
Impressionists Impressionism
taking or showing extreme care about minute details
A graph
look on the state website for their booklet showing how the calculation is done
When it's showing numbers on the screen...
It tells you if a chemical/liquid is either Alkaline or Acid(Alkaline showing in the blue section in the high numbers and the Acid showing in the red areas withe the low numbers).
marks on a number line showing where the numbers are