Page 26 - Math 4

Number System Number System

Examples

a) VI = 5 + 1 = 6 b) XVIII = 10 + 5 + 3 = 18

c) LXVII = 50 + 10 + 5 + 2 = 67 d) CCLV = 100 + 100 + 50 + 5 = 255

1.16 Conversion of Hindu-Arabic numerals to Roman numerals

Let's recall the Roman symbols upto 10. In the case of Hindu-Arabic
numerals greater than 10, write them in the expanded forms and convert
them into Roman numerals.

Examples

a) 19 = 10 + 9 = XIX b) 28 = 20 + 8 = XXVIII

c) 39 = 30 + 9 = XXXIX d) 40 = 50 – 10 = XL

e) 49 = 40 + 9 = XLIX f) 86 = 50 + 30 + 6 = LXXXVI

g) 90 = 100 – 10 = XC h) 93 = 90 + 3 = XCIII

i) 389 = 300 + 80 + 9 = CCCLXXXIX

j) 765 = 500 + 200 + 50 + 10 + 5 = DCCLXV

k) 999 = 900 + 90 + 9 = CMXCIX

l) 2145 = 2000 + 100 + 40 + 5 = MMCXLV

Exercise - 1.4

Section A - Classwork

Let's tell and write the answers as quickly as possible.

1. a) The seven basic symbols in Roman numerals are

b) The Roman numeral for the value of 50 is

c) The Roman numeral for the value of 100 is

d) The Roman numeral for the value of 500 is

e) The Roman numeral for the value of 1000 is

vedanta Excel in Mathematics - Book 4 24 Approved by Curriculum Development Centre, Sanothimi, Bhaktapur