6th Maths : Term 1 Unit 1 : Numbers : Text Book Back Exercises Questions with Answers, Solution

__Exercise
1.1__

**1. Fill in the blanks.**

**(i) The smallest 7 digit number is **__10,00,000__**.**

**(ii) The largest 8 digit number is **__9,99,99,999__**.**

**(iii) The place value of 5 in 7005380 is **__5 × 1000 = 5000 (five thousand)__**.**

**(iv) The expanded form of the number 76,70,905 is **__7 × 1000000 + 6 × 100000 + 7 × 10000 + 0 × 1000 +9 × 100
+ 0 × 10 + 5 × 1__**.**

**2. Say True or False.**

**(i) In the Indian System of Numeration the number
67999037 is written as 6,79,99,037.**

**(ii) Successor of a one digit number is always a
one digit number**

**(ii) Predecessor of a 3-digit number is always a
3 or 4-digit number**

**(iv) 88888 = 8 × 10000 + 8 × 100 + 8 × 10 + 8 ×
1**

**3. Complete the given order.**

**Ten
crore, crore, ten lakh, **

**4. How many ten thousands are there in the smallest
6 digit number?**

**Solution:**

Smallest 6 digit number is 1,00,000

No. of ten thousands = __100000__

= 10000

= ‘10’ten thousands

**5.
Using the digits 5, 2, 0, 7, 3 form the largest 5 digit number and the smallest
5 digit number.**

**Solution:**

Largest Number = 75320

Smallest Number = 20357

**6.
Observe the commas and write down the place value of 7.**

**(i)
56,74,56,345 **

**(ii)
567,456,345**

(i) 56,** 7**4,56,345 . ’

= 7 × 10,00,000

= 70,00,000

= 70 lakh

(ii) 56** 7**,456,345

= 7 × 1,000,000

= 7,000,000

= 7 million. ,

**7.
Write the following numbers in the International System by using commas.**

**(i)
347056**

**(ii)
7345671**

**(iii)
634567105**

**(iv)
1234567890**

(i) 347056 = **347,056**

(ii) 7345671 = **7,345,671**

(iii) 634567105 = **634,567,105**

(iv) 1234567890 = **1,234,567,890**

**8.
Write the largest six digit number and put commas in the Indian and the International
Systems.**

**Solution:**

Largest 6 digit number = 999999

Indian System : 9,99,999 = Nine lakh ninety nine thousand nine
hundred and ninety nine

International System : 999,999 = Nine hundred and ninety nine thousand
nine hundred and ninety nine

**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 lakh thirty two thousand one
hundred and five.

(ii) 9,75,63,453 = Nine crore seventy five lakh sixty three thousand
four hundred and fifty three.

**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 − Three hundred forty five thousand six hundred and
seventy eight

(ii) 8,343,710 − Eight million three hundred forty three
thousand seven hundred and ten

(iii) 103,456,789 − One hundred three million four hundred fifty
six thousand seven hundred and eighty nine

**11.
Write the number name in numerals.**

**(i)
Two crore thirty lakh fifty one thousand nine hundred eighty.**

**Answer:** = 2,30,51,980

**(ii)
Sixty six million three hundred forty five thousand twenty seven.**

**Answer:** = 66,345,027

**(iii)
Seven hundred eighty nine million, two hundred thirteen thousand four hundred fifty
six.**

**Answer:** = 789,213,456

**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:** Forest land = 26,345 sq.km

**13.
The number of employees in the Indian Railways is about 10 lakh. Write this in the
International System of numeration.**

**Solution:**

Employees in Indian Railways = 10 lakh

In International System = ?

Indian System = TL L TTh Th H T O

1 0 0 0 0
0 0

International

System = M HTh TTh Th H T O

10,00,000 = 1 million

10 Lakh = 1 million

__Objective Type Questions__

**14.
1 billion is equal to **

** (a) 100 crore**

** (b) 100 million**

** (c) 100 lakh**

** (d) 10000 lakh**

**Answer:** (a) 100 crore

**15.
The successor of 10 million is**

** (a) 1000001**

** (b) 10000001**

** (c) 9999999**

** (d) 100001**

**Answer:** (a) 1000001

**16.
The difference between the successor and the predecessor of 99999 is**

** (a) 90000**

** (b) 1**

** (c) 2 **

**(d)
99001**

**Answer:** (c) 2

**17.
The expanded form of the number 6,70,905 is**

**(a)
6 × 10000 + 7 × 1000 + 9 × 100 + 5 × 1**

**(b)
6 × 10000 + 7 × 1000 + 0 × 100 + 9 × 100 + 0 × 10 + 5 × 1**

**(c)
6 × 1000000 + 7 × 10000 + 0 × 1000 + 9 × 100 + 0 × 10 + 5 × 1**

**(d)
6 × 100000 + 7 × 10000 + 0 × 1000 + 9 × 100 + 0 × 10 + 5 × 1**

**Answer:** (d) 6 × 100000 + 7 × 10000 + 0 × 1000 + 9 × 100 + 0 ×
10 + 5 × 1

__Answers:__

__Exercise 1.1__

**1) (i) 10,00,000 (ii) 9,99,99,999 (iii) Five Thousand (iv)
7000000+600000+70000+900+5 **

**2) (i) True (ii) False(iii) False (iv) False**

**3) Lakh, Ten thousand, Thousand, Hundred, Ten, One**

**4) 10**

**5) Largest − 75320 Smallest − 20357**

**6) (i) 70,00,000 (ii) 7,000,000**

**7) (i) 347,056 (ii) 7,345,671 (iii) 634,567,105 (iv)
1,234,567,890**

**8) Indian System : 9,99,999 (Nine Lakh Ninety Nine Thousand Nine
Hundred Ninety Nine)**

**International System : 999,999 (Nine Hundred Ninety Nine
Thousand, Nine Hundred Nintey Nine)**

**9) (i) Seventy five lakh thirty two thousand one hundred five**

** (ii) Nine crore
seventy five lakh sixty three thousand four hundred fifty three**

**10) (i) Three hundred forty five thousand six hundred seventy
eight**

** (ii) Eight million
three hundred forty three thousand seven hundred ten**

** (iii) One hundred
three million four hundred fifty six thousand seven hundred eighty nine**

**11) (i) 2,30,51,980 (ii) 66,345,027 (iii) 789,213,456**

**12) 26,345**

**13) 1,000,000 (One million)**

**Objective Type Questions**

**14) (a) 100 Crore**

**15) (b) 10000001**

**16) (c) 2**

**17) d) 6×100000 + 7×10000 + 0×1000 + 9×100 +0×10 + 5×1**

Tags : Questions with Answers, Solution | Numbers | Term 1 Chapter 1 | 6th Maths , 6th Maths : Term 1 Unit 1 : Numbers

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6th Maths : Term 1 Unit 1 : Numbers : Exercise 1.1 | Questions with Answers, Solution | Numbers | Term 1 Chapter 1 | 6th Maths

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