Question

write rules of Roman numbers

Answer 1

There are a few rules for writing numbers with Roman numerals. Repeating a numeral up to three times represents addition of the number. For example, III represents 1 + 1 + 1 = 3. Only I, X, C, and M can be repeated; V, L, and D cannot be, and there is no need to do so.

Answer 2

Romans represented numbers using the numerals I, V, X, L, C, D, and M only

Given below are Hindu - Arabic equivalents of I, V, X, L, C, D, and M

I - 1

V - 5

X -10

L - 50

C - 100

D - 500

M - 1000

The rules to be followed for writing numbers with Roman numerals are as follows-

Repeating a numeral in succession represents addition.

A numeral can be repeated in succession up to three times only.

V (5), L (50), and D (500) cannot be repeated.

When a numeral of lower value is written to the right side of numeral of higher value, the values of all the digits are added.

When a numeral of lower value is written to the left side of numeral of higher value, it represents subtraction. This rule is used to write a number that otherwise would take repeating of a numeral four or more than four times. Writing a smaller numeral to the left of a larger numeral represents subtraction. For example, IX = 10 - 1 = 9. VIIII cannot be used to represent 9 since a numeral can be repeated in succession up to three times only.

Only pairs of numerals that use this subtraction rule are

IV : 4 = 5 - 1

IX : 9 = 10 - 1

XL : 40 = 50 - 10

XC : 90 = 100 - 10

CD : 400 = 500 - 100

CM : 900 = 1000 - 100

A bar over a numeral means to multiply the number by 1000.

The symbols V, L and D are never written to the left of a symbol of greater value.

The symbol I (1) can be subtracted from V (5) and X (10) only.

The symbol X (10) can be subtracted from L (50), M (1000) and C (100) only.

HOPE IT HELPS ^-^