# 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

heads taken together.

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.