4th Class Mathematics Roman Numerals Introduction

Introduction

Category : 4th Class

*    Introduction

 

The numerals, we use is commonly known as hindu -Arabic Numerals. 0, 1, 2, 3, 4, 5,6, 7, 8, 9 _ _ _ _ etc. are example of hindu-Arabic numerals. In ancient time Romans developed a system of numerations (numbering) which is known as Roman Numerals. I, II, III, IV, V, VI, VII, VIII, IX, _ _ _  etc. are example of Roman Numerals.  

Roman numerals are formed by using the following symbols:  

Roman Numeral Value
I 1
V 5
X 10
L 50
C 100
D 500

 

Note the following points with reference to the Roman Numerals: 

  • In the Roman Numerals there is no separate notation for zero.
  • Big numerals are obtained by adding smaller numerals.
  • 1 = I, II = 1 + 1 = 2, III = 1 + 1 + 1 = 3, 10 + 10 = 20  and so on.
  • If a big numeral is followed by a small numeral then they are added to get the resulting numeral, e.g.
  • VI = 5 + 1 = 6 , XXIII = 10 + 10 +1 +1 +1 = 23
  • If a small numeral is followed by a big numeral then the smaller numeral is subtracted to get the resulting numeral.

e.g. IV = 5 - 1 = 4, IX = X - 1 = 9,  XIX = 10 + (10 -1) =10 + 9 =19 .

  • All numerals up to 39 can be expressed by the symbol I, V and X only.  

 

See the following table:  

I

1

II

2

III

3

IV

4

V

5

VI

6

VII

7

VIII

8

IX

9

X

10

XI

11

XII

12

XIII

13

XIV

14

XV

15

XVI

16

XVII

17

XVIII

18

XIX

19

XX

20

XXI

21

XXII

22

XXIII

23

XXIV

24

XXV

25

XXVI

26

XXVII

27

XXVIII  

28

XXIX

29

XXX  

30

XXXI

31

XXXII

32

XXXIII

33

XXXIV

34

XXXV

35

XXXVI

36

XXXVII

37

XXXVIII

38

XXXIX

39

 

   

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