# 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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