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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.

 

In England, 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  
54 LIV  = L +IV = 50 + 4 = 54
     
60 LX  = X after L is 10 more than 50 or 50 + 10 = 60
67 LXVII  = LX + VII = 60 + 7 = 67
     
70 LXX  = L + XX = 50 + 20 = 70
     
80 LXXX  = L + XXX = 50 + 30 = 80
84 LXXIV  = L + XXXIV = 50 + 34 = 84
     
90 XC  = X before C is 10 less than 100 or 100 - 10 = 90
96 XCVI = XC + VI = 90 + 6 = 96

 

 

Example

Convert 89 and 97 to Roman Numerals.

 

Answer

89 = 50 + 39 = L + XXXIX = LXXXIX

97 = 90 + 7 = XC + VII = XCVII

10 questions