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Descending order of the digits 9 5 4 1 0> > > > number, the numbers are arranged in ascending
The greatest number formed is 95410. order.

Ascending order of the digits 0 < 1 < 5 < 5 < 9. Vice-versa when we arrange numbers from the
A number cannot begin with 0, so we will put largest number to the smallest number then the
it in the second place (after second smallest numbers are arranged in descending order.
digit). Example 2. Write in descending order:
The smallest digit (other than 0) is 1. 32593; 60537; 28524; 57198
The number will begin with 1. Solution: Compare digits according to place
The smallest number formed is 10459. value.

Arranging Numbers Descending order means arranging numbers
from the largest number to the smallest number;
We know, when we arrange the numbers
from the smallest number to the largest 60537 > 57198 > 32593 > 28524

E xercise 1.1

1. Write the numbers using commas accord ing to Indian system of numer a tion:
(i) 11245670 (ii) 22402151 (iii) 30608712 (iv) 190308020
2. Write the numbers in words:
(i) 34,025
(ii) 7,09,115
(iii) 47,60,00,317
(iv) 6,18,07,000
3. Write the number in figures:
(i) Four lakh fifty seven thousands four hundred.
(ii) Sixty lakh two thousand and seven hundred seventy five.
(iii) Two crore fifty lakh forty thousand three hundred and three.
(iv) Sixty crore sixty lakh sixty thousand six hundred.
4. Write the num bers us ing com mas ac cord ing to In ter na tional sys tem of numer a tion:
(i) 97645315 (ii) 20048421
(iii) 476356 (iv) 490026834
5. Write the numbers in words in both Indian and Inter na tional system:
(i) 123115027
(ii) 89643092
6. Write the great est and small est numbers of 7-digits to be form by these digits:
(i) 1,3,4,5,6,8,9
(ii) 8,9,6,4,3,0, 2

7. Write in expanded form:
(i) 28369 (ii) 419,247
8. Arrange these numbers in ascend ing and descend ing order:
(i) 7,54,321; 7,35,654; 7,87,963; 7,52,412
(ii) 25,34,851; 24,25,682; 25,82,093; 24,78,412

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Mathematics In Focus - 6