# How to Remember and use Roman Numerals

Updated on December 6, 2012

## Roman Numbers

My 4 yr old brought home a roman numerals sheet today and immediately I thought about how much my 3rd and 4th graders love to write numbers in the "code" of roman numerals.

First is the basics. These are the basic numbers in the roman system. The numbers are represented by letters from the Latin alphabet.

There are several things that the students get confused about when writing in roman numerals. The combination of how the symbols are put together determine the number. When a smaller number is placed in front of a larger number it means to subtract that number from the larger number when it is placed to the right that you add the number together.

## Mnemonic Devicce

How to remember the Roman Numerals beyond I, V, X

Lucky

Cows

Drink

Milk

The mnemonic device helps my students remember the order of the rest of the Roman Numerals. Also remember that the numbers only occur with the lead digit being 1 or 5.

The Roman system includes the number 5, 10, 50, 100, 500, 100, etc

## How to use Roman Numerals

I = 1

II = 2

III = 3

IV = 4 - notice that the I before the V means 5 - 1 = 4

V = 5

VI = 6

VII = 7

VIII = 8

IX = 9

X = 10

## A few more examples

VL = 45, 5 before the 50 means to subtract

IC = 99

MCL = 1000 + 100 + 50 = 1150

DIL = 500 + (50-1) = 549

18

26

2

3

## Popular

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• Ryan

23 months ago

thanks for the help on writing school essay

• Gail

4 years ago

I learned:

If Victor's Xray Looks Clean Don't Medicate

• AUTHOR

kthix10

6 years ago from IL

LOL - that is a great point!

• againsttheodds

6 years ago

Never heard of that lucky cows drink milk memory device before, now I can always know what Super Bowl it is.

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