Roman Numerals Worksheet (Page 4 of 5) in pdf

Roman Numerals Worksheet Page 4

By first rule, select X as it is largest alphabet smaller than the value of 45. Since X cannot be

repeated 4 times to give 40 by second rules, next largest alphabet (L) greater than current (X) is

selected and a subtraction is performed.

Now, 45 = 50 – 1 -1 -1 – 1 – 1 = IIIIIL, but by second rule ‘I’ cannot be repeated more than 3

times by second rule.

Again, 45 = 50 – 5, but 5 is not power of 10. Therefore 5 cannot be used in subtraction.

45 = (50 – 10) + 5 = XLV. (Right)

4. Don’t subtract an alphabet from another, which is more than 10 times smaller than the other.

Subtracting ‘I’ from V and X is valid, but from L and C is invalid.

Sample questions for homework and assessment papers:

1. What Roman alphabet is used to represent decimal 10?

a) C

b) D

c) X

d) V

2. Convert the Roman numeral LXIX to decimal number.

3. Convert decimal 73 to Roman numeral.

4. Mark true or false:

a) IX means, 1 + 10 = 11. (true/false)

b) ‘14’ is written as XIIII in Roman numerals. (true/false)

c) VII = 5 + 1 + 1. (true/false)

d) VIII = 5 -1 -1 -1. (true/false)

e) XX = 1010. (true/false)

Side A

Side B

100

Roman Numerals Worksheet Page 4