Page 9 - Math Skill - 5

1 1 Large Numbersarge Numbers
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Learning Outcomes

� Lakhs and Crores � Different Ways of Expressing Numbers
� Reading and Writing Large Numbers � Successor and Predecessor
� International Place Value System � Comparing Numbers and their Ordering
� Relationship between Indian and International Place Value Chart � Finding and Forming Numbers
� Face Value and Place Value

Boot-Up

Vanya’s father gives her a cheque of ` 10,000
to donate in the school camp to educate
the under privileged children of slums.
Now, Vanya wants to know, why a cheque
has the amount, written in both numbers
as well words. Her father explained that
it is done to make sure that the number is
understood correctly and no change made
in the cheque.
Write down the cheque number:

1. In standard form: ___________________________________________________

2. In expanded form: ___________________________________________________

3. In word form: ___________________________________________________

Lakhs and Crores
In Indian system of numeration the largest 7-digit number 9999999 is read as

‘Ninety-nine lakh ninety-nine thousand nine hundred ninety-nine’.
When we add 1 more to it, we get:
9 9 9 9 9 9 9

+ 1
1 0 0 0 0 0 0 0 Thus, 9999999 + 1 = 10000000
Here, 10000000 is the smallest 8-digit number and in Indian system of numeration it is read as
‘one crore’. Thus, we now extend the place value chart to 8 places and in the same way,

5,00,00,000 is read as ‘Five crore’. 7,00,00,000 is read as ‘Seven crore’.
In this way, we get the largest 8-digit number 9,99,99,999.