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3. Write the following numbers.

(a) The largest 7-digit number (b) The smallest 8-digit number
(c) The smallest 7-digit number having 3 different digits
(d) The difference between the largest 8-digit number and the smallest 7-digit number

4. Write the place value of the underlined digits.
4 ten thousands or 40,000
(a) 85,43,715 ______________________ (b) 6,70,539 ______________________
(c) 7,42,313 ______________________ (d) 82,05,35,444 ______________________
(e) 8,05,35,673 ______________________ (f) 75,32,54,829 ______________________

5. Find the sum and difference of the place values of the underlined digits in the given
numbers.
(a) 85,43,65,930 (b) 29,82,43,926 (c) 9,16,48,532 (d) 14,83,16,526
6. Write the following numbers in the expanded form.

(a) 85,34,917 (b) 3,72,05,415 (c) 7,82,54,251 (d) 18,71,32,815
7. Write the following numbers in the standard form.

(a) 5,00,000 + 20,000 + 3,000 + 40 + 2
(b) 8,00,00,000 + 70,00,000 + 4,00,000 + 10,000 + 3,000 + 500 + 80 + 2
(c) 4 crores + 3 ten lakhs + 7 lakhs + 6 ten thousands + 2 thousands + 5 hundreds +
1 ten + 3 ones

(d) 2 ten crores + 3 crores + 4 lakhs + 7 ten thousands + 5 hundreds + 6 tens +
2 ones
(e) 8 ten lakhs + 3 lakhs + 4 ten thousands + 2 thousands + 7 hundreds + 2 tens +
3 ones

International System of Numeration

A different system of numeration is practiced in most other countries of the world. It is
known as the International System of Numeration. You may remember this system from your
previous class. We shall revise it and use it to write large numbers.

The International place value chart looks like this.
MILLIONS THOUSANDS ONES

Hundred Ten Millions Hundred Ten Thousands Hundreds Tens Ones
millions millions (M) thousands Thousands (Th) (H) (T) (O)
(HM) (TM) (HTh) (TTh)
The number 18345215 is separated as 18,345,215 and is read as eighteen million three
hundred forty-five thousand two hundred fifteen.

Example 6: Write the numeral for thirty-two million four hundred five thousand six
hundred eighty-eight.

Solution: The numeral for the above number is 32,405,688.

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