Successor and Predecessor

What is Predecessor ?

The number which comes just before a particular number is called its predecessor.
So, the predecessor of a given number is 1 less than the given number.

For example

9,99,99,999 is predecessor of 10,00,00,000 .

The predecessor of a whole number is the number obtained by subtracting 1 from the given number .

Clearly, the predecessor of 1 is 0; predecessor of 2 is 1; predecessor of 3 is 2 and so on.

The whole number 0 does not have any predecessor.

We observe that every whole number, other than zero, has its predecessor.

Also, if a is the successor of b, then b is the predecessor of a.

Number - 1 = Predecessor

The number which comes immediately after a particular number is called its successor.
Successor of a given number is 1 more than the given number.

For example

10,00,00,000 is the successor of 9,99,99,999.

The successor of a whole number is the number obtained by adding 1 to it.

Clearly, the successor of 0 is 1; successor of 1 is 2; successor of 2 is 3 and so on.

We observe that every whole number has its successor.

Number + 1 = Successor

Some more Examples-

The Successor and Predecessor of a number are explained using examples.

PREDECESSOR NUMBER SUCCESSOR

(7148 - 1) 7147 7148 (7148 + 1) 7149

(8950 - 1) 8949 8950 (8950 + 1) 8951

(7620 - 1) 7619 7620 (7620 + 1) 7621

(12499 - 1) 12498 12499 (12499 + 1) 12500

To find the predecessor of a number, subtract 1 from the given number.

To find the successor of a number add 1 to the given number.

Q1) Find the successor and predecessor of each of the following whole numbers:

(i) 1,000

(ii) 11,999

(iii) 4,00,099

(iv) 10,00,001

(v) 99,999

Q2) Find the successor and predecessor of each of the following whole numbers:

Q3 ) Find the successor and predecessor of each of the following whole numbers: