Page 23 - Maths Class 03

Successor and Predecessor

The number which comes just after a particular number is called its

successor.

The successor of a whole number is one more than the given number and is

obtained by adding 1 to it.

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

The number which comes just before a particular number is called its

predecessor.

The predecessor of a whole number is one less than the given number and

is obtained by subtracting 1 from it.

The predecessor of 1 is 0; predecessor of 2 is 1; predecessor of 3 is 2 and so on.

Example : Find the successor and the predecessor for each of the

following whole numbers.

a. 1199 b. 1000 c. 4000

Solution : a. 1199

The successor of 1199 is

1199 + 1 = 1200

The predecessor of 1199 is

1199 – 1 = 1198

b. 1000

The successor of 1000 is

1000 + 1 = 1001

The predecessor of 1000 is

1000 – 1 = 999

c. 4000

The successor of 4000 is

4000 + 1 = 4001

The predecessor of 4000 is

4000 – 1 = 3999

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