Roman Numbers : Definition, Rules | Class 5 | Numbers
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NUMBERS

Roman Numerals for Class 5 Maths

Roman numerals are the symbol that is used in mathematics. The students will learn about the roman number table in this learning concept. They will learn about how to write roman numbers.

In this learning concept, the students will learn to

  • classify the roman numerals and Hindu Arabic numbers.
  • Application of roman numerals rule.
  • Use of roman numerals.

Each concept is explained to class 5 maths students using illustrations, examples, and mind maps. Students can assess their learning by solving the two printable worksheets given at the page’s end.
Download the roman numerals worksheet for class 5 and check the solutions for roman numerals provided in PDF format.

How to Read Roman Numerals

  • The Roman Numbers system is an old numeral system.
  • Roman Numbers system is used throughout Europe.
  • Roman numbers are represented by some letters from the Latin alphabet.
  • Gradually Roman Numeral system changed to the Modern Roman Numbers system.
  • In modern system seven different letters are used to represent Roman Numbers.
roman numerals

Each of these seven different letters represent different numerical value:

Roman Numerals Table

roman numerals

We can convert any Roman Numeral in Hindu-Arabic number, also Hindu-Arabic number can be written in the form of a Roman Numeral.

Note:

  1. In Roman number system there is no symbol for zero.
  2. Also, there is no place value system.

Roman Number Rules:

Rule 1: When one letter is present and repeated in number then the value of the symbol is added with itself.

Examples:

roman number rules

XXX=30

roman number rules

CCCC=400

Note 1: Also, the symbols V, L, D are never repeated.

Rule 2: When a letter with smaller value is present after a letter with greater value, then the value of the letter will be added.

Examples:

roman number rules

DXXX=530

roman number rules

MCC=1200

Rule 3: When a letter with smaller value is present before a letter with greater value, then subtract that small value from the greater value.

Examples:

roman number rules

LM=950

Rule 4: A symbol cannot be repeated more than three times. There are some Roman Numbers:

roman number rules

Rule 5: 1000 can be represented by a line on the letter, which is called bar.

Examples:

roman number rules

Rule 6: Also, the letter use in mixed form can be determine as integer.

roman number rules
roman number rules

Roman Numerals to Numbers

Rule for addition:

Step 1: First we convert the given Roman numerals into Hindu-Arabic number.

Step 2: Then we add the Hindu-Arabic numbers.

Step 3: Now again we convert the Hindu-Arabic number (number from Step 2) into Roman Numerals.

Example:

Add LV and XV.

Solution:

Here, LV = L +V
= 50 + 5
= 55
XV = X + V
= 10 + 5
= 15
Now, LV + XV will be 55 + 15 = 70
Now, 70 = 50 + 10 + 10
= L + X + X
= LXX
Finally, we get, LV + XV = LXX.

Rule for subtraction:

Step 1: First we convert the given Roman numerals into Hindu-Arabic number.

Step 2: Then we subtract the Hindu-Arabic numbers.

Step 3: Now again we convert the Hindu-Arabic number (number from Step 2) into Roman Numerals.

Example:

Subtract XXVII from LXXXVIII.

Solution:

Here, XXVII = X + X + V + I + I
= 10 + 10 + 5 + 1 + 1
= 27
LXXXVIII = L + X + X + X + V + I + I + I
= 50 + 10 + 10 + 10 + 5 + 1 + 1+ 1
= 88
Now, LXXXVIII – XXVII will be 88 – 27 = 61
61 = 50 + 10 + 1
= L + X + I
= LXI

Use of Roman Numbers:

  1. We use roman numerals in clocks and watches.
  2. Roman numbers are used to signifying of book chapters.
  3. Roman numbers used in National football League for title.

Did you know:

Did you know
concept map for Roman-Numerals
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