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Practice time 1a

1. Write the number names of the following numbers according to the Indian place
value system.
( a) 545864 (b) 4634561 (c) 4056249

( d) 77326434 (e) 87928043 (f) 73038963

2. Write the numerals for the following numbers.

( a) Five lakh thirty-four thousand nine hundred forty-eight
( b) Fifty lakh seventy thousand six hundred ninety-four

( c) Six crore sixty-six lakh twenty-four thousand four hundred twelve

( d) Seven crore seventy-three thousand sixteen
3. Rewrite the following numbers with commas according to the Indian place value
system. Also, write these numbers in words.

( a) 7854475 (b) 79876560 (c) 80078004

( d) 57654323 (e) 60052902 (f) 59934230

4. As per the 2011 Census, the population of Delhi was 1,67,87,941. How many ones, tens,
hundreds, thousands, ten thousands, lakhs, ten lakhs and crores are there in the number?

Face VaLue anD PLace VaLue

Face Value

The face value of a digit in a number is the digit itself. Math Insight
For face values, the
Example 1: Find the face value of each digit in 8,36,42,089. place at which the digit

Solution: Face value of 8 = 8, Face value of 3 = 3 is present in the number
does not matter.
Face value of 6 = 6, Face value of 4 = 4
Face value of 2 = 2, Face value of 0 = 0 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

Place Value

The place value of a digit depends on the place at which it occurs in the number.

Place value of a digit = Face value × Value of the place at which the digit occurs in the
number

Think Tank Logical Thinking

In the number, 6708813, which is the smallest digit whose face value is equal to its place value?

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