Table of contents  
Whole Numbers  
Number Line  
Addition on the Number Line  
Subtraction on the Number Line  
Multiplication on the Number Line 
All the positive counting numbers starting from one are called Natural Numbers.
Whole numbers are the collection of natural numbers including zero. So, the zero is the predecessor of 1 in the whole numbers.
If we add 1 to any natural number, we get the next number, which is called the Successor of that number.
For Example:
12 + 1 = 13
So 13 is the successor of 12.
If we subtract 1 from any natural number, we get the predecessor of that number.
For Example:
12 – 1 = 11
So 11 is the predecessor of 12.
To draw a number line, follow these steps
This is the number line for the whole numbers.
If we have to add 2 and 5, then start with 2 and make 5 jumps to the right. As our 5th jump is at 7 so the answer is 7.
The sum of 2 and 5 is 2 + 5 = 7
If we have to subtract 6 from 10, then we have to start from 10 and make 6 jumps to the left. As our 6th jump is at 4, so the answer is 4.
The subtraction of 6 from 10 is 10 – 6 = 4.
If we have to multiply 4 and 3, then Start from 0, make 4 jumps using 3 units at a time to the right, as you reach to 12. So, we say, 3 × 4 = 12.
134 videos325 docs42 tests

1. What are natural numbers? 
2. What are whole numbers? 
3. What is the predecessor and successor of a number? 
4. How can a number line be used for addition? 
5. How can a number line be used for subtraction? 

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