Page 15 - Math Skill - 5

Large Numbers 13

Different Ways of Expressing Numbers
Numbers can be expressed in several ways. We can write the numbers in words, in numerals
and in expanded notations. Expanded notation means expressing a number as the sum of the
place values of its digits.

Standard form 75638

Expanded form 70000 + 5000 + 600 + 30 + 8
Expanded form in words 7 ten thousands + 5 thousands + 6 hundreds + 3 tens + 8 ones

Let’s Attempt

Example: Write the number 6,59,82,937 in its expanded form.
Solution: The expanded notation for the number 6,59,82,937 is

6,00,00,000 + 50,00,000 + 9,00,000 + 80,000 + 2,000 + 900 + 30 + 7

Exercise 1.3

1. Write the face value and place value of the circled digits in the following numbers.

(a) 6 5,42,173 (b) 5 4 ,37,951 (c) 42,5 6 ,159
2. Write the place value of 7 in the following numbers.

(a) 9,81,45,217 (b) 5,21,17,131 (c) 4,13,74,121
3. Write the following numbers in the expanded form.

(a) 3,82,865 (b) 78,365 (c) 12,05,73,471
4. Write the numerals in the short form or standard form.
(a) 70,00,000 + 2,00,000 + 800 + 10 + 6
(b) 40,00,000 + 7,00,000 + 30,000 + 4,000 + 800 + 20 + 5
(c) 3,00,00,000 + 70,00,000 + 9,00,000 + 80,000 + 6,000 + 800 + 90 + 7

Successor and Predecessor

Successor

A number which comes just after the given number in order is called the successor of that
number. Successor of a number is obtained by adding 1 to the given number.

For example, we find the successor of 72, 897 is follows: 72,897 + 1 = 72,898
Thus, successor of 72,897 is 72, 898

Predecessor

A number which comes just before the given number in order is called the predecessor of that
number. Predecessor of a number is obtained by subtracting 1 from the given number.
For example, we find the predecessor of 6,56,23,261 as follows:

6,56,23,261 – 1 = 6,56,23,260