Roman Numerals

Roman Numerals

Ancient Romans used a special method of showing numbers

Examples: They wrote III instead of 3
And wrote IX instead of 9

 

The Roman Symbols

Romans Numerals are based on the following symbols:

1
5
10
50
100
500
1000
I
V
X
L
C
D
M

Basic Combinations

Which can be combined like this:

Forming Numbers – The Rules

When a symbol appears after a larger symbol it is added

  • Example: VI = V + I = 5 + 1 = 6

But if the symbol appears before a larger symbol it is subtracted

  • Example: IX = X – I = 10 – 1 = 9

Don’t use the same symbol more than three times in a row.

Remember: After Larger is Added

On a desktop computer children can try and test their roman numeral skills on this game here

 

Test yourself on the following romans numerals page here

 

Using a roman numeral calculator here to see if you have got your answers correct.