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E:\Working\Brother_Education\Preparatory_Stage_Maths-4\Open_Files\Chap-01
\\October 31, 2023 3:30 PM Bharat Arora Proof-3 Reader _________________________ Date: ___________________74

rule 4: If the smaller numeral is in between two numerals of greater value, subtract
the smaller numeral from the greater numeral to the right.

examples: (a) XIV = 10 + (5 – 1) = 10 + 4 = 14 (b) XIX = 10 + (10 – 1) = 10 + 9 = 19

The Roman numerals for the first 30 Hindu-Arabic numbers are shown below:

1 I 11 XI 21 XXI

2 II 12 XII 22 XXII

3 III 13 XIII 23 XXIII

4 IV 14 XIV 24 XXIV

5 V 15 XV 25 XXV

6 VI 16 XVI 26 XXVI

7 VII 17 XVII 27 XXVII
8 VIII 18 XVIII 28 XXVIII

9 IX 19 XIX 29 XXIX

10 X 20 XX 30 XXX

Think and Answer
Find the following and fill in the blanks using the Roman numerals.
1. Your father’s age ___________________
2. Your mother’s age ___________________
3. Date of birth of your best friend ___________________
4. Date on which India became independent ___________________

Practice time 1F

1. Write the roman numerals for each of the following numbers.

(a) 16 (b) 25 (c) 39 (d) 27

2. Write the Hindu-Arabic numerals for each of the following.

(a) XVIII (b) XXIX (c) XXXVII (d) XXXIV

3. Fill in the blanks:

(a) The Roman numeral for 26 is __________.

(b) The successor of XXX is ____________.

(c) The predecessor of 20 in Roman numeral is _______.
(d) The greatest 1-digit number in Roman numeral is ___________.

(e) When we add V to X and then subtract I from the number, we get _______.

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