Class 6 Maths

Lesson 1.  Knowing Your Numbers 

In previous class you have learn small numbers. In class 6, you will read, write and understand large numbers. Which starts from one lakh, then 10 lakh and then 1 crore. 

Examples 

Example 1. What is Greatest Value of 5 Digits

Answer 99,999 is the greatest value of 5 digit. If we will add 1 in it, it will become smallest value of 6 digit that is 1,00,000

Example 2. What is Smallest  Value of 5 Digits

10,000 is the smallest value of 5 digit. If we will deduct one, it will become 9,999 which is the 4 digit and greatest value of 4 digit. 

Example 3. Expended Value of 65472

If we will write 65,472, we will say 65 thousand 4 thousand and 72

Now 

2 is on 1 digit place so, expended value of 2 = 2 X 1 = 2

7 is on 2 digit place, so expended value of 7 = 7 X 10 = 70

Together we will speak 

70 and 2 = 72 

4 is on 3 digit place, so expended value is = 4 X 100 = 400

Together, we will speak 472, four hundered and seventy two

5 is on 4th digit place so, expended value of 5 = 5 X 1000 = 5000

Together, we will speak 5472, five thousand four hundered and seventy two

6 is on 5th digit place, so expended value of 6 is = 6 X 10000 = 60000

Together, we will speak 65472, sixty thousand five thousand four hundered and seventy two

Example 4. In indian system of numeration, how will you write 5263492563

526,34,92,563

We will write it five hundred twenty six crore, thirty four lakh, ninty two thousand, five hundred and sixty three. 

Example 5. One billion is equal to 

you may know 10 lakh is equal to one million 

So, 100 Crore is equal to one billion

100,00,00,000 = 1 X 10^9

Question : What is predecessor number

Answer If we deduct 1 from any number, we will get predecessor number. For example

1000 and its predecessor number is = 1000 - 1 = 999

Question : What is successor of number

If we add 1 in any number, we will get successor of number

for example 1000 and its successor is = 1000 +1 = 1001