# Exercise 1.1 - Chapter 1 Numbers Term 1 6th Maths Guide Samacheer Kalvi Solutions - SaraNextGen [2024]

Ex 1.1
Question $1 .$

Fill in the blanks.
1. The smallest 7 digit number is
2. The largest 8 digit number is
3. The place value of 5 in 7005380 is
4. The expanded form of the number $\overline{76,70,905}$ is
Solution:
1. $10,00,000$
2. $9,99,99,999$
3. $5 \times 1000=5000$
4. $7 \times 10,00,000+6 \times 1,00,000+7 \times 10,000+0+9 \times 100+0+5 \times 1$
(or)
$70,00,000+6,00,000+70,000+900+5$

Question 2 .
Say True or False.
1. In the Indian System of Numeration, the number 67999037 is written as 67999037
2. The successor of a one-digit number is always a one-digit number.
3. The predecessor of a 3 -digit number is always a 3 or 4-digit number.
4. $88888=8 \times 10000+8 \times 100+8 \times 10+8 \times 1$
Solution:
1. True
2. False
3. False
4. False

Question 3 .
Complete the given order.
Ten crore, crore, ten lakh,
Solution:
Ten crores, Crore, Ten lakh, Lakh, Ten Thousand, Thousand, Hundred, Ten, One

Question 4 .
How many ten thousands are there in the smallest 6 digit number?
Solution:
Smallest six-digit number is $1,00,000$
1 lakh = Ten Thousand

Question $5 .$
Using the digits $5,2,0,7,3$ forms the largest 5 digit number and the smallest 5 digit number.
Solution:
Given digits $=5,2,0,7,3$
Largest 5 digit number $-75320$
Smallest 5 digit number $-20357$

Question $6 .$
Observe the commas and write down the place value of 7 .
1. $56,74,56,345$
2. $567,456,345$
Solution:
1. $56,74,56,345$
Place value of 7 is $7 \times 10,00,000=70,00,000=$ Seventy Lakhs.
2. $567,456,345$
Place value of 7 is $7 \times 1,000,000=7,000,000=$ Seven Million.

Question $7 .$
Write the following numbers in the International system by using commas.
(i) 347056
(ii) 7345671
(iii) 634567105
(iv) 1234567890
Solution:

Question 8.

Write the largest six-digit number and put commas in the Indian and the International Systems.

Solution:

The largest six-digit number is 999999

Question $9 .$
Write the number names of the following numerals in the Indian System.
(i) $75,32,105$
(ii) $9,75,63,453$
Solution:
(i) $75,32,105$

Seventy-Five Lakhs Thirty-Two Thousand One Hundred and Five

(ii) 9,75,63,453

Nine crores Seventy Five Lakhs Sixty Three Thousand Four Hundred and Fifty-Three.

Question 10 .
Write the number names in words using the International System
(i) 345,678
(ii) $8,343,710$
(iii) $103,456,789$
Solution:
(i) 345,678

(ii)

Eight Million Three Hundred and Forty-Three Thousand Seven Hundred and Ten

(iii)

One Hundred Three Million Four Hundred Fifty-Six Thousand Seven Hundred and Eighty’ Nine.

Question 11.
Write the number name in numerals.
1. Two crores thirty lakhs fifty-one thousand nine hundred eighty.
2. Sixty-six million three hundred forty-five thousand twenty-seven.
3. Seven hundred eighty-nine million, two hundred thirteen thousand four hundred fifty six.
Solution:
1. $2,30,51,980$ 2. $66,345,027$ 3. $789,213,456$

Question 12 .
Tamil Nadu has about twenty-six thousand three hundred forty-five square kilometre of Forest land. Write the number mentioned in the statement in the Indian System.
Solution:
26,345 sq km.

Question $13 .$
The number of employees in the Indian Railways is about 10 lakhs. Write this in the International System of numeration.
Solution:
$1.000,000$ (one million)

Objective Type Questions

Question $14 .$
1 billion is equal to
(a) 100 crore
(b) 100 million
(c) 100 lakh
(d) 10000 lakh

Solution:

(a) 100 crore

Question 15 .
The successor of 10 million is
(a) 1000001
(b) 10000001
(c) 9999999
(d) 100001
Solution:
(b) 10000001

Question $16 .$
The difference between successor and predecessor of 99999 is
(a) 90000
(b) 1
(c) 2
(d) 99001
Solution:
(c) 2

Question $17 .$
The expanded form of the number $6,70,905$ is
(a) $6 \times 10000+7 \times 1000+9 \times 100+5 \times 1$
(b) $6 \times 10000+7 \times 1000+0 \times 100+9 \times 100+0 \times 10+5 \times 1$
(c) $6 \times 1000000+7 \times 10000+0 \times 1000+9 \times 100+0 \times 10+5 \times 1$
(d) $6 \times 100000+7 \times 10000+0 \times 1000+9 \times 100+0 \times 10+5 \times 1$
Solution:
(d) $6 \times 100000+7 \times 10000+0 \times 1000+9 \times 100+0 \times 10+5 \times 1$