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Roman numerals
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Interactive exercises
Results
Converter
Rules

Interactive exercises - Roman numerals


Interactive exercises are generic, application compiles a new series of tasks each time you start.
INTERACTIVE EXERCISES
Interactive exercises: {{restit}}
Name:
Virtual keyboard:
Number of tasks: {{(plynum)}}
Difficulty: {{resdifi}}
{{$index+1}}. task
{{one.qins}}

{{one.qtxt}} =

7
8
9
X
M

4
5
6
V
D

1
2
3
I
C

0
CE
L
Correct answer

RESULT
Interactive exercises: {{restit}}
Name:
Date: {{timest * 1000 | date:'dd.MM.yyyy HH:mm:ss'}}
Num. of tasks: {{(anscor+answro)}}
Difficulty: {{resdifi}}
Correct answers: {{anscor}}
Wrong answers: {{answro}}
Efficiency: {{anscor/(anscor+answro)*100|number:0}} %
Time: {{tmdur}} s
Time per task: {{tmdur / (anscor+answro)|number:1}} s

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Roman numerals

Roman numerals are a numeral system that was used by ancient Rome. Numbers in this system are represented by combinations of letters from the Latin alphabet.

Roman numerals were in use until the 14th century, when system was replaced by the more convenient Arabic numerals. However, Roman numerals are still used today in certain contexts.
Image Roman numerals
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Performance - Roman numerals
Proportion of correct answers (in %) for the last {{chrAnum}} exercises.
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Tasks solved by months - Roman numerals
Number of completed tasks by months. One exercise usually contains 6 to 15 tasks.
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Performance by months - Roman numerals
Proportion of correctly solved tasks (in %) by months.
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Tasks by difficulty - Roman numerals
Number of solved tasks by difficulty in each month.
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Learn Roman numerals


Select a Roman numeral and check out its decimal value.


{{shwro}} = {{shwar}}

Roman numerals converter


You can convert numbers between 1 and 3999.
Enter a Roman numeral


CONVERT

{{ronumdn}} = {{ronumres}}

Enter a decimal number


CONVERT

{{arnumdn}} = {{arnumres}}

Table Roman numerals

Basic table for converting Roman numerals into Arabic decimal numerals.

Roman numeralsArabic numerals
I 1
V 5
X 10
L 50
C100
D500
M1000

Roman numerals have no symbol to represent 0.

Roman numerals conversion rules

1. Addition
If a numeral comes after a numeral that is larger or equal in value, then it must be added to the numeral before it.
VI = 5 + 1 = 6
XX = 10 + 10 = 20

2. Subtraction
A smaller numeral placed before a larger numeral indicates subtraction of that smaller numeral from the larger one.
You cannot subtract more than one value from a Roman numeral.
IV = 5 - 1 = 4
IX = 10 - 1 = 9

3. Max three together
You cannot add more than three of the same Roman numeral together.
III = 3
Wrong: IIII, correct: IV = 4

4. L and D cannot be subtracted
Only powers of ten (I, X, C, M) can be subtracted.
Value 5
Wrong: VX (10 - 5)
Correct: V (5)

5. One-fifth or one-tenth
You can subtract only value that is 1/5th (one-fifth) or 1/10th (one-tenth) the larger one.
Wrong: IC = 100 - 1 = 99
Correct: XCIX = (100 - 10) + (10 - 1) = 99

Worksheets - Roman numerals


Create worksheets and PRINT or SAVE them. You can create unlimited number of different worksheets.

1. CHOOSE SETTINGS :: Choose the number of tasks, difficulty and type of tasks.
2. GENERATE TASKS :: Use the GENERATE button to create a new serie of tasks if you don't like the worksheet you can easily generate another.
3. CREATE PDF :: The worksheet (PDF) opens in a new tab, you can PRINT it or SAVE it to your computer.
NUMBER OF TASKS
DIFFICULTY
CHOOSE TYPE OF TASKS
EXAMPLE OF A TASK
WORKSHEET
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