Category : 4th Class
This lesson will help you to:—
Real Life Examples
We are surrounded by numbers in each & every sphere of our life. Large numbers are often used in monetary transactions in businesses, banks etc. Total number of schools in a city, total numbers of students in a big school is all examples of large numbers.
QUICK CONCEPT REVIEW
Large Numbers
A census officer visited Rohan's home. He was confused why she is asking so many questions. He was really curious & asked his father all about census. His father told him that census is the process to count & record all the information of the population of a country.
Rohan says that population of the whole country must be a very big number. His father told him that for this you will have to learn about large numbers.
Let us all learn about large numbers.
Let us have a look at the table given below:
Number |
Read As |
1 |
One |
10 |
Ten |
100 |
One hundred |
1000 |
One thousand |
10000 |
Ten thousand |
100000 |
One lakh |
1000000 |
Ten lakh |
10000000 |
Crore |
100000000 |
Ten Crore |
The numbers given in the above table are based on the Indian system of numeration.
As the number increases it becomes larger and larger.
6 DIGIT NUMBERS
We know that 99,999 is the greatest 5 digit number. If we add 1 to it, we will get the smallest 6 digit number.
Place Value
The place value of a 6 digit number is Lakhs in the place value chart.
Have a look at the place value chart given below:
Lakhs Period |
Thousands Period |
Ones Period |
|||
Lakhs |
Ten thousands |
Thousands |
Hundreds |
Tens |
Ones |
5 |
4 |
7 |
2 |
8 |
3 |
The place value chart has been separated into three groups:
"The ones period has three places - Hundreds, tens & ones.
The thousands period has two places – Ten thousands & thousands.
Amazing Facts
Next period is the lakhs period which includes - Ten lakhs & lakhs.
But we will learn ten lakhs in higher classes.
Use of Comma
If we write the number without using the place value chart, we use comma to separate the periods.
Let us consider an example:
5, 47, 283
Here, First comma is used when the ones period is complete.
Second comma is used when thousands period is complete.
Next comma is used to separate thousands and lakhs period.
ACITIVITY TIME
Put commas to separate the periods;
Reading a 6 digit number; 5, 47, 283
We read a 6 digit number as mentioned below:
Five lakhs forty seven thousands two hundred eighty three.
ACTIVITY TIME
Read the following numbers:
Expanded notation: 5, 47, 283
Let us learn to write a number in its expanded notation form. Look at the table given below:
This table can be summarized as follows;
500000 + 40000 +7000 +200 + 80 + 3
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