Question

4.
5.
(6) 99876 ....... 99786
How many times do we use 9 to write the numbers between 1 to 100?
Find the difference between the greatest four digit natural number and smallest
three digit natural numbers.
What Have We Learnt ?
1.
The numbers that we use for counting
are called natural numbers.
2.
.. etc. are all
1,2,3,4,5,6....
natural numbers.
We denote natural numbers by 21
Thus, N= {1,2,3,4,5 etc.}
The smallest natural numbers is 1.
90:
By adding 1 to a natural number, The
next natural number can be obtained.
How many
vehicle have
assed by​

Answer 1

Answer:

The smallest 4−digit number =1000.

⇒ The greatest 4−digit number =9999.

⇒ Total 4− digit numbers =(9999−1000)+1

=8999+1

=9000

So, we say that we have 9000 four-digit numbers.