NCERT Solutions for Class 9 Maths Chapter 1 Number Systems
NCERT Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.1
Ex 1.1 Class 9 Maths Question 1.
Is zero a rational number? Can you write it in the form pq,where p and q are integers and q ≠0?
Solution:
Yes, zero is a rational number it can be written in the form pq.
0 = 0/1 = 0/2 = 0/3 etc. denominator q can also be taken as negative integer.
Ex 1.1 Class 9 Maths Question 2.
Find six rational numbers between 3 and 4.
Solution:
Let q_{i} be the rational number between 3
and 4, where j = 1 to 6.
∴ Six rational numbers are as follows:
Thus, the six rational numbers between 3 and 4 are
Ex 1.1 Class 9 Maths Question 3.
Find five rational numbers between 3/5 and 4/5.
Solution:
Since, we need to find five rational numbers, therefore, multiply numerator and denominator by 6.
Ex 1.1 Class 9 Maths Question 4.
State whether the following statements are true or false. Give reasons for your answers.
(i) Every natural number is a whole number.
(ii) Every integer is a whole number.
(iii) Every rational number is a whole number.
Solution:
(i) True
∵ The collection of all natural numbers and 0 is called whole numbers.
(ii) False
∵ Negative integers are not whole numbers.
(iii) False
∵ Rational numbers are of the form p/q, q ≠ 0 and q does not divide p completely that are not whole numbers.
NCERT Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.2
The topics and subtopics in Chapter 1 Number Systems:

 Number systems
 Introduction
 Irrational Numbers
 Real Numbers And Their Decimal Expansions
 Representing Real Numbers On The Number Line
 Operations On Real Numbers
 Laws Of Exponents For Real Numbers
 Summary
NCERT Solutions for Class 9 Maths Number System Ex 1.2
NCERT Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.3
The topics and subtopics in Chapter 1 Number Systems:
 Number systems
 Introduction
 Irrational Numbers
 Real Numbers And Their Decimal Expansions
 Representing Real Numbers On The Number Line
 Operations On Real Numbers
 Laws Of Exponents For Real Numbers
 Summary
NCERT Solutions for Class 9 Maths Number System Ex 1.3
NCERT Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.4
The topics and subtopics in Chapter 1 Number Systems:
 Number systems
 Introduction
 Irrational Numbers
 Real Numbers And Their Decimal Expansions
 Representing Real Numbers On The Number Line
 Operations On Real Numbers
 Laws Of Exponents For Real Numbers
 Summary
NCERT Solutions for Class 9 Maths Number System Ex 1.4
NCERT Solutions for Class 9 Maths Number System Ex 1.5
 Number systems
 Introduction
 Irrational Numbers
 Real Numbers And Their Decimal Expansions
 Representing Real Numbers On The Number Line
 Operations On Real Numbers
 Laws Of Exponents For Real Numbers
 Summary
NCERT Solutions for Class 9 Maths Number System Ex 1.5
NCERT Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.6
 Number systems
 Introduction
 Irrational Numbers
 Real Numbers And Their Decimal Expansions
 Representing Real Numbers On The Number Line
 Operations On Real Numbers
 Laws Of Exponents For Real Numbers
 Summary
Ex 1.6 Class 9 Maths Question 1.
Find:
Solution:
Ex 1.6 Class 9 Maths Question 2.
Find:
Solution:
Ex 1.6 Class 9 Maths Question 3.
Simplify:
Solution:
Number Systems Class 9 Extra Questions Maths Chapter 1
Extra Questions for Class 9 Maths Chapter 1 Number Systems