I

1

II

2

III

3

IV

4

V

5

VI

6

VII

7

VIII

8

IX

9

X

10

XV

15

XX

20

XXX

30

XL

40

L

50

XC

90

C

100

CX

110

CD

400

D

500

DC

600

CM

900

M

1,000

MC

1,100

How do you combine Roman numerals into a single number?

Numerals before: subtract

Numerals after: add

What numerals can you add to another?

Any values smaller than the numeral being added to.

e.g. You can add I, V, X, or L to C

**Do not use larger numbers to add:
you will create a subtraction!**

Which numerals can you subtract from another?

The "One" value immediately before the value being subtracted from.

e.g. To subtract from C, you can use X.

*Do not use numerals any farther away, such as "IC" for 99.*

How do you read a complex Roman numeral?

MCDLXXV

MCDLXXV

**Separate the numerals into groups of additions, subtractions, and individuals**

M CD LXX V

**Add each piece together (subtract if necessary)**

1000 + 400 + 70 + 5

1475

MMMCCCXXXIII

MMM CCC XXX III

3000 + 300 + 30 + 3

3333

MCMXCVIII

M CM XC VIII

1000 + 900 + 90 + 8

1998