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romaN Numerals Subject Enrichment

The symbols that we use today to write numbers are called Hindu-Arabic Numerals.
However, a long time ago, there was another system of representing numbers called the

Roman Numerals. This system started in ancient Rome.

In this system, seven letters of the alphabet are used as basic symbols.
roman numerals I V X L C D M
Hindu-arabic numerals 1 5 10 50 100 500 1000

A combination of these letters, when arranged in the correct order, represents a counting

system. The Roman numerals for the first 10 Hindu-Arabic numbers are shown below:

1 2 3 4 5 6 7 8 9 10
I II III IV V VI VII VIII IX X

Think and Answer
List 5 places where we use Roman numeral in today's life to write numbers.

Encapsulate
math
NUmberS UP tO 9999

Place Value of a Number Face Value of a Number

• Value of each digit in a number Face value is the actual value of the digit in a number
• Multiply the digit with 1000, if it is in the thousands place. example: Face value of 4 in 485 is 4.
• Multiply the digit with 100, if it is in the hundreds place.
• Multiply the digit with 10, if it is the tens place. 2-digit Numbers
• Multiply the digit with 1, if it is in the ones place.
Smallest number 10 Greatest number 99
example: Place value of 4 in 485 is 400

expanded Form 3-digit Numbers
The number represented as the sum of place value of its Smallest number 100 Greatest number 999
each digit.
example: 485 = 400 + 80 + 5
4-digit Numbers
Formation of greatest and Smallest Numbers
Smallest number 1000 Greatest number 9999
To form the greatest To form the smallest
number, arrange the given number, arrange the given
digits in descending order. digits in descending order. even and Odd numbers
Without repetition of digits: 1, 2, 7, 6
example: 7621 example: 1267 Every even number ends with the digit 2, 4, 6, 8 or 0.
With repetition of digits: 2, 0 example: 56, 742, 1230
Every odd number ends with the digit 1, 3, 5, 7 or 9.
example: 2220 example: 2000
example: 51, 637, 1459

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