Understanding Roman Numerals

Roman Costume
Tiffany is very interested in the past and loves learning about different historical periods. She likes to wear the clothes of the period she is learning about.

Tiffany has been learning about Roman Numerals and has discovered many interesting facts.

Did you know –

he Romans did not have numbers so they used seven letters to represent numbers.

I – 1    V – 5    X – 10    L – 50    C – 100    D – 500    M – 1000

There is no 0 in Roman numerals

Roman numerals are still used today and are often seen on clocks or watches

Roman Numerals

What are the Roman Numerals for 1 – 100?

1

2

3

4

5

I

II

III

IV

V

6

7

8

9

10

VI

VII

VIII

IX

X

11

12

13

14

15

XI

XII

XIII

XIV

XV

16

17

18

19

20

XVI

XVII

XVIII

XIX

XX

21

22

23

24

25

XXI

XXII

XXIII

XXIV

XXV

26

27

28

29

30

XXVI

XXVII

XXVIII

XXIX

XXX

31

32

33

34

35

XXXI

XXXII

XXXIII

XXXIV

XXXV

36

37

38

39

40

XXXVI

XXXVII

XXXVIII

XXXIX

XL

41

42

43

44

45

XLI

XLII

XLIII

XLIV

XLV

46

47

48

49

50

XLVI

XLVII

XLVIII

XLIX

L

51

52

53

54

55

LI

LII

LIII

LIV

LV

56

57

58

59

60

LVI

LVII

LVIII

LIX

LX

61

62

63

64

65

LXI

LXII

LXIII

LXIV

LXV

66

67

68

69

70

LXVI

LXVII

LXVIII

LXIX

LXX

71

72

73

74

75

LXXI

LXXII

LXXIII

LXXIV

LXXV

76

77

78

79

80

LXXVI

LXXVII

LXXVIII

LXXIX

LXXX

81

82

83

84

85

LXXXI

LXXXII

LXXXIII

LXXXIV

LXXXV

86

87

88

89

90

LXXXVI

LXXXVII

LXXXVIII

LXXXIX

XC

91

92

93

94

95

XCI

XCII

XCIII

XCIV

XCV

96

97

98

99

100

XCVI

XCVII

XCVIII

XCIX

C

200

300

400

500

600

CC

CCC

CD

D

DC

700

800

900

1000

 

DCC

DCCC

CM

M

 

What are the special rules for 4, 6, 9 and 11

There are special rules when dealing with certain numbers:

4 – the Roman Numeral is IV – the letter I before the V means 1 has to be subtracted

6 – the Roman Numeral is VI – the letter I after the V means that 1 has to be added

9 – the Roman Numeral is IX – the letter I before the X means that it has to be subtracted

11 – the Roman Numeral is XI – the letter I after the X means that it has to be added

Other letters can be added or subtracted in a similar way:

40 – the Roman Numeral is XL – the X is before the L so 10 has to be subtracted from 50

900 – the Roman Numeral is CM – the C is before the M so 100 has to be subtracted from 1000

600 – the Roman Numeral is DC – the C is after the D so 100 has to be added to 500

 

Tiffany has learned enjoyed learning about Roman Numerals and she hopes you have too.