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Convert Numbers up to 50 to Roman Numerals

In this worksheet, students will convert normal numbers to Roman numerals up to 50.

'Convert Numbers up to 50 to Roman Numerals' worksheet

Key stage:  KS 2

Year:  Year 4 Maths worksheets

Curriculum topic:   Number: Number and Place Value

Curriculum subtopic:   Read Roman Numerals (I to C/1 to 100)

Difficulty level:  

Worksheet Overview

The numbers that we use today are not the same as the ones the Romans used.

Roman numerals were used all over the Roman Empire.

 

a Roman soldier

 

In the United Kingdom, they are still used occasionally, for example, on film credits and clock faces.

 

Remember that the Romans didn't have a symbol for the number 0.

The Romans used these symbols:

 

I  = 1

V = 5

X = 10

L = 50

C = 100

 

All other numbers up to 100 can be built using these symbols by adding or subtracting.

 

You should know the following:

 

1 I  
2 II  
3 III  
4 IV I before V is 1 less than 5
5 V  
6 VI I after V is 1 more than 5
7 VII II after V is 2 more than 5
8 VIII III after V is 3 more than 5
9 IX I before X is 1 less than 10
10 X  
11 XI I after X is 1 more than 10
12 XII II after X is 2 more than 10

 

 

We build bigger numbers by adding 10s or Xs in Roman numerals.

 

20 XX  = X + X = 20
21 XXI  = XX + I = 20 + 1
30 XXX  = X + X + X = 30
37 XXXVII  = XXX + VII = 30 + 7
40 XL  = X before L is 10 less than 50 or 50 - 10 = 40
48 XLVIII  = XL + VIII = 40 + 8 = 48
49 XLIX  = XL + IX = 40 + 9 = 49
50 L  

 

 

 

Example

Convert the number 46 to Roman numerals.

 

Answer

46 = 40 + 6 = XL + VI = XLVI

 

Let's have a go at some questions now.

Remember that you can check back to this page at any point by clicking on the red help button on the screen.

 

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