Page 12 - Math Genius C5

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\ 08-Oct-2025 Bharat Arora Proof-9 Reader’s Sign _______________________ Date __________

We read it as eight crore sixty-three lakh eighty-two thousand seven hundred ninety-three. Practice time 1a
We can also write the number using commas as

1. Write the number names of the following numbers according to the Indian place
Be Aware
8, 63, 82, 793 We put a comma (,) or leave some value system.
space to separate two periods. ( a) 545864 (b) 4634561 (c) 4056249
Crores Ones All the digits in the same period
period period are read together and the name ( d) 77326434 (e) 87928043 (f) 73038963
Lakhs Thousands
period period of the period (except ones) is 2. Write the numerals for the following numbers.
read along with them.
( a) Five lakh thirty-four thousand nine hundred forty-eight
Example 1: Write the following numbers in the Indian place value chart. Also, write their ( b) Fifty lakh seventy thousand six hundred ninety-four
number names. ( c) Six crore sixty-six lakh twenty-four thousand four hundred twelve
( a) 53007572 (b) 48123477 (c) 89057413 (d) 13500969

Solution: We arrange the given numbers in the place value chart in the following way. ( d) Seven crore seventy-three thousand sixteen
3. Rewrite the following numbers with commas according to the Indian place value
Crores Lakhs Thousands Ones Number names system. Also, write these numbers in words.

C tL L TTh Th H t O ( a) 7854475 (b) 79876560 (c) 80078004

(a) 5 3 0 0 7 5 7 2 Five crore thirty lakh seven thousand five ( d) 57654323 (e) 60052902 (f) 59934230
hundred seventy-two
(b) 4 8 1 2 3 4 7 7 Four crore eighty-one lakh twenty-three 4. As per the 2011 Census, the population of Delhi was 1,67,87,941. How many ones, tens,
thousand four hundred seventy-seven hundreds, thousands, ten thousands, lakhs, ten lakhs and crores are there in the number?

(c) 8 9 0 5 7 4 1 3 Eight crore ninety lakh fifty-seven
thousand four hundred thirteen Face VaLue anD PLace VaLue

(d) 1 3 5 0 0 9 6 9 One crore thirty-five lakh nine hundred Face Value
sixty-nine
The face value of a digit in a number is the digit itself. Math Insight
Example 2: Write the following numbers in numerals. For face values, the
( a) Six crore thirty-six lakh forty-two thousand two hundred one Example 1: Find the face value of each digit in 8,36,42,089. place at which the digit

( b) Nine crore three lakh fifty thousand twenty-nine Solution: Face value of 8 = 8, Face value of 3 = 3 is present in the number
does not matter.
Solution: Writing the digits in their respective places, we get Face value of 6 = 6, Face value of 4 = 4
( a) Face value of 2 = 2, Face value of 0 = 0 C tL L TTh Th H t O
C tL L TTh Th H t O
Face value of 8 = 8, Face value of 9 = 9 8 3 6 4 2 0 8 9
6 3 6 4 2 2 0 1 Math Insight
Using commas: 6,36,42,201 We write a zero where no Place Value
digit is given in a particular The place value of a digit depends on the place at which it occurs in the number.
( b) place.
C tL L TTh Th H t O
Place value of a digit = Face value × Value of the place at which the digit occurs in the
9 0 3 5 0 0 2 9 number

Using commas: 9,03,50,029
Think Tank Logical Thinking
Teacher’s Explain that it is very important to mark the period when we write the numbers in financial statements like
Tip on bank cheques. In the number, 6708813, which is the smallest digit whose face value is equal to its place value?

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