Page 25 - Math Skill - 5

Roman Numerals 23

(c) CDXXXV

= CD + XXX + V Challenge
= 400 + 30 + 5 = 435 I am a number,
but I am nothing at all,
Add or subtract me to any
Fact-o-meter number, big or small.

You can learn the Roman numbers by thinking “Medical Xavier” The answer won’t change,
1000 500 100 50 10 5 1 It’s as simple as can be,
There is no symbol in
M e D i C a L X a V I e r roman numbers for me.
It has the Roman numerals in descending order from 1000 to 1. What number am I?
Can you tell my name?

Exercise 2.1

1. Write the Roman number for each of the following.
(a) 83 (b) 187 (c) 349

(d) 248 (e) 274 (f) 307

(g) 497 (h) 177

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

(a) CLXIX (b) CCXLVI (c) CDXXVII
(d) CCCXIII (e) XCI (f) CDIV

3. Fill in > or <.

(a) XLVII LXXIX (b) C XC

(c) XLII LXI (d) LXX LXXI

(e) LXVII LXIX (f) XC LXXXVI

4. Write the answer in Roman numbers.
(a) 3 × 7 (b) 80 + 3 (c) 68 ÷ 2

(d) IV × VI (e) XCIII – IV (f) XLV ÷ V

(g) 8 × 4 (h) LIX –XII

5. Which of the following are meaningless? Justify your answer.
(a) CI (b) VVCX (c) VC

(d) CCV (e) IL (f) LLIV

(g) CXXXXV (h) CDXXX