business mathematics

ROMAN numbers in maths and their rules:

some of the ROMAN numerals and their corresponding indo-arabic numerals:
I - 1
V - 5
X - 10
L - 50
C - 100
D - 500
M - 1000

While writing ROMAN numbers, the following rules are to be kept in mind.

1. If a digit is repeated a number of times, the value of the digit is added as many times as it occurs.
examples: II = 1+1 = 2
XXX = 10+10+10 = 30
MM = 1000+1000 = 2000

2. To write a number in which the smallest digit always comes to the right of the right of the greater digit, we add all the values of all the digits.
examples: VIII = 5+1+1+1 = 8
LXVI = 50+10+5+1 = 66
DCLXVII = 500+100+50+10+5+1+1 = 667

3. TO WRITE A NUMBER IN WHICH the smaller digit is placed before the greater digit. we subtract the value of the smaller digit from that of the greater digit.
examples: IV = 5-1 =4
XL = 50-10 = 40
LIX = 50+(10-1) = 59