IX in Roman Numerals

According to the symbols used for Roman Numerals, I denote 1 and X denotes 10. Symbols are placed in a variety of ways, to represent the numbers. We join these symbols through rules assigned for Roman numerals, to get IX, i.e., 9. In the next section, we will see how the rules work to represent numbers.
 

Rule 1: Addition method

When a letter with greater numerical value precedes a letter with smaller numerical value, the letters are added.

Ex: XI, where, X=10 and I=1, X > I. So,

XI=X+I=10+1=11.

Rule 2: Repetition Method: If a letter repeats itself for two or three times, the letters are added together. Ex: XXX, where X=10, so, XXX=X+X+X=10+10+10=30

Rule 3: Subtraction method

When a letter with smaller numerical value precedes a letter with greater numerical value, the letters are subtracted.

Ex: XL, where, X=10 and L=50, X < L. So,

XL=L-X=50-10=40. 

Here, for IX, the Subtraction method applies. IX=X-I=10-1=9. 

Rule 4: Limitation Rule 

The same letter or symbol cannot be repeated more than thrice. Ex: 40=XL, and 40≠ XXXX.
 

This method involves breaking down numbers into parts based on place values like thousands, hundreds, tens, or ones. Each place value is then expressed as Roman numeral equivalent. 

This method works by:

i) Expand and break the number into its place values.

ii) Convert each place value into an equivalent Roman numeral.

iii) Combine the acquired Roman numerals to get the result

Ex: 952

900 → 1000-100 = M-C =CM

50 → L

2 → II

Combining, CMLII

    Ex : 94

90 →100-10=C- X= XC

4 → IV

Combining, XCIV
 

This method involves breaking down of larger Roman numerals into smaller, based on the values of individual Roman numeral symbol. This method works by:

 i) Identifying groups: Look for numerals that should be added together or subtracted, based on the Addition and Subtraction rules explained in the previous section.

ii) Break into smaller and simpler parts.

iii) Add or subtract values.

Ex: LXXXIX

L → 50

XXX : 30→ X+X+X=10+10+10=30

IX → 9

Add 50+30+9 =89

Ex: XCVII

XC : 90 →100-10=90

V  →5

II: 2→I+I=1+1=2

Add 90+5+2=97
 

Roman Numerals are the counting system that originated in ancient Rome. This system involves letters I, V, X, L, C, D, M and these are combined to produce different whole numbers.

Here is the list of Roman numerals related to IX:

I : represents 1
II :  represents 2
III :  represents 3
IV :  represents 4
V :  represents 5
VI :  represents 6
VII :  represents 7
VIII :  represents 8
IX :  represents 9
X :  represents 10

• Roman numerals: Numeral system used in Rome, where the numbers represent Latin Alphabets like I, X, C, M etc.

Basic Roman Numerals -

I :  1
II :  2
III :  3
IV :  4
V :  5
VI :  6
VII :  7
VIII :  8
IX :  9
X :  10
L : 50
C : 100
D : 500
M : 1000

• XCIX: Represents 99 in roman numeral

• Expansion Method: This method involves breaking down numbers into parts based on place

values like thousands, hundreds, tens, or ones.

• Grouping Method: This method involves breaking down of larger Roman numerals into smaller