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E:\Working\Focus_Learning\Math_Genius_4_(25-10-2023)\Open_Files\Chap-01
\\December 6, 2023 1:30 PM Bharat Arora P-6 Reader _________________________ Date: ___________________74

PredeCessor And suCCessor

The predecessor of a number is a number that comes just before the given number.

The predecessor of a number is obtained by subtracting 1 from it.
For example, 48,947 – 1 = 48,946 ; 2,34,564 – 1 = 2,34,563

Clearly, the predecessor of a number is 1 less than the given number.
The successor of a number is a number that comes just after the given number. The
successor of a given number is obtained by adding 1 to it.

For example, 78,547 + 1 = 78,548 ; 6,85,798 + 1 = 6,85,799

Clearly, the successor of a number is 1 more than the given number.
example: Write the predecessor and the successor of the following numbers.

(a) 47,129 (b) 87,100 (c) 2,54,785 (d) 7,84,071

Solution:
(a) Predecessor of 47,129 = 47,129 – 1 = 47,128

Successor of 47,129 = 47,129 + 1 = 47,130
(b) Predecessor of 87,100 = 87,100 – 1 = 87,099

Successor of 87,100 = 87,100 + 1 = 87,101
(c) Predecessor of 2,54,785 = 2,54,785 – 1 = 2,54,784

Successor of 2,54,785 = 2,54,785 + 1 = 2,54,786

(d) Predecessor of 7,84,071 = 7,84,071 – 1 = 7,84,070
Successor of 7,84,071 = 7,84,071 + 1 = 7,84,072

Think and Answer
1. What is the successor of the greatest 5-digit number?
2. How many digits are there in the predecessor of the greatest 6-digit number?

Practice time 1b

1. Write the place value of underlined digit(s) in the given numbers:

(a) 46975 (b) 70347 (c) 27364

(d) 373640 (e) 436243 (f) 508244
2. express the following numbers in the expanded form:

(a) 47889 (b) 80791 (c) 578914 (d) 800450

3. Write the following numbers in its short form.
(a) 300000 + 8000 + 900 + 60 (b) 1L + 4TTh + 3Th + 6H + 2T + 9O

(c) 8 × 100000 + 7 × 10000 + 5 × 1000 + 4 × 100 + 2 × 1

16 Mathematics-4