How would you work out 1 to 2000 inclusive in ancient and modern notation of Roman numerals with explanations and examples?

Answer 1

Roman numerals were once notated in ancient times as follows:-

Units: I II III IIII V VI VII VIII and VIIII

Tens: X XX XXX XXXX L LX LXX LXXX and LXXXX

Hundreds: C CC CCC CCCC D DC DCC DCCC and DCCCC

Thousands: M and MM

To select any numerals from 1 to 2000 simply write them out in descending order as in the following examples:-

19 = XVIIII which can be abridged to IXX

199 = CLXXXXVIIII which can be abridged to ICC

1999 = MDCCCCLXXXXVIIII which can be abridged to IMM

So: IXX+ICC+IMM = MMCCXVII => (20-1)+(200-1)+(2000-1) = 2217

Note that if we were to add them together in their unabridged format the result would be exactly the same.

Roman numerals are now notated in modern times as follows:-

Units: I II III IV V VI VII VIII and IX

Tens: X XX XXX XL L LX LXX LXXX and XC

Hundreds: C CC CCC CD D DC DCC DCCC and CM

Thousands: M and MM

To select any number from 1 to 2000 simply write them out in descending order as in the following examples:-

19 = XIX remains the same

199 = CXCIX remains the same

1999 = MCMXCIX remains the same

So: XIX+CXCIX+MCMXCIX = total confusion