# NCERT Solutions For Class 6 Maths Chapter 2 Exercise 2.1

## Ncert Solutions for Class 6 Maths Chapter 2 Whole Numbers Exercise 2.1:

Ncert Solutions for Class 6 Maths Chapter 2 Whole Numbers Exercise 2.1 pdf download: In this Chapter Whole numbers We learn the basics of the Numbers System In class 6 maths ncert Exercise 2.1 Solutions. This Chapter Knowing our Numbers is very important for Class 6 maths Students to get a High Score in their Exam. And we help the Class 6 Students to Achieve Their Dream By providing Class 6 Maths Ncert Solutions Chapter 2 Whole numbers Exercise 2.1 With Free Pdf Download. And We also Provide Video solutions Of Whole Numbers Class 6 maths Ncert Solutions.

### Ncert Solution for Class 6 Maths Chapter 2 Whole Numbers Exercise 2.1 pdf:-

Exercise 2.1 Class 6 maths NCERT solutions Chapter 2 Whole Numbers Exercise 2.1:-

### Ncert Solutions for Class 6 Maths Chapter 2 Whole Numbers Exercise 2.1 Textbook solution:-

As we know, we use 1, 2, 3, 4,… when we begin to count. They come naturally
when we start counting. Hence, mathematicians call the counting numbers as
Natural numbers.
Predecessor and successor
Given any natural number, you can add 1 to
that number and get the next number i.e. you
get its successor.
The successor of 16 is 16 + 1 = 17,
that of 19 is 19 +1 = 20 and so on.
The number 16 comes before 17, we
say that the predecessor of 17 is 17–1=16,
the predecessor of 20 is 20 – 1 = 19, and
so on.
The number 3 has a predecessor and a
successor. What about 2? The successor is
3 and the predecessor is 1. Does 1 have both
a successor and a predecessor?
We can count the number of children in our school; we
can also count the number of people in a city; we can count
the number of people in India. The number of people in the
whole world can also be counted. We may not be able to
count the number of stars in the sky or the number of hair
on our heads but if we are able, there would be a number for
them also. We can then add one more to such a number and
1. Write the predecessor
and successor of
19; 1997; 12000;
49; 100000.
2. Is there any natural
number that has no
predecessor?
3. Is there any natural
number which has no
successor? Is there a
last natural number?
get a larger number. In that case we can even write the number of hair on two
It is now perhaps obvious that there is no largest number. Apart from these
questions shared above, there are many others that can come to our mind
when we work with natural numbers. You can think of a few such questions
and discuss them with your friends. You may not clearly know the answers to
many of them
Whole Numbers
We have seen that the number 1 has no predecessor in natural numbers. To the
collection of natural numbers we add zero as the predecessor for 1.
The natural numbers along with zero form the collection of whole
numbers.
In your previous classes you have learnt to
perform all the basic operations like addition,
subtraction, multiplication and division on
numbers. You also know how to apply them to
problems. Let us try them on a number line.
Before we proceed, let us find out what a
number line is!

The Number Line
Draw a line. Mark a point on it. Label it 0. Mark a second point to the right of
0. Label it 1.
The distance between these points labelled as 0 and 1 is called unit distance.
On this line, mark a point to the right of 1 and at unit distance from 1 and
label it 2. In this way go on labelling points at unit distances as 3, 4, 5,… on
the line. You can go to any whole number on the right in this manner.
This is a number line for the whole numbers.
What is the distance between the points 2 and 4? Certainly, it is 2 units.
Can you tell the distance between the points 2 and 6, between 2 and 7?
On the number line you will see that the number 7 is on the right of 4.
This number 7 is greater than 4, i.e. 7 > 4. The number 8 lies on the right of 6
1. Are all natural numbers
also whole numbers?
2. Are all whole numbers
also natural numbers?
3. Which is the greatest
whole number?
and 8 > 6. These observations help us to say that, out of any two whole
numbers, the number on the right of the other number is the greater number.
We can also say that whole number on left is the smaller number.
For example, 4 < 9; 4 is on the left of 9. Similarly, 12 > 5; 12 is to the
right of 5.
What can you say about 10 and 20?
Mark 30, 12, 18 on the number line. Which number is at the farthest left?
Can you say from 1005 and 9756, which number would be on the right
relative to the other number.
Place the successor of 12 and the predecessor of 7 on the number line.