NCERT Solutions for class 9 Maths Chapter 1 Exercise 1.1 Number Systems - PDF Download

NCERT solutions class 9 maths chapter 1 ex 1.1 Number Systems help the students to distinguish between natural numbers, integer numbers, whole numbers, writing correct format of real numbers, calculation of rational numbers between two numbers, etc. Class 9 maths chapter 1 exercise 1.1 ncert solutions is composed of 4 questions. Out of the 4 questions, 3 questions are short answer type while 1 question having four sub-parts is about finding the statement is true or false with a reason and these questions are simple to solve.

The problems also help students learn how to write different numbers, such as N for natural numbers and Z for integers. Ex 1.1 class 9 maths solutions by eSaral will help you solve all the crucial questions in the exam. NCERT class 9 chapter 1 solutions are prepared by qualified teachers to help you in the exam preparation. 

Download NCERT solutions for ex 1.1 of class 9 maths chapter 1 to enhance your self-confidence and exam performance. Here on eSaral, we provide a free PDF Download option for all questions of ex 1.1. To practice these questions, you can download these PDF solutions from our official website.

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Topics Covered in Exercise 1.1 class 9 Mathematics Questions

Chapter 1 ex 1.1 of the NCERT solution for class 9 maths includes all types of numbers with detailed explanations. You can check the detailed explanation of these numbers mentioned below.

The Number System is one of the most important parts of NCERT solutions for class 9 maths. It's the mathematical notation made up of numbers and symbols. It's all about understanding rational and irrational numbers and how to solve them. eSaral is here to help you every step of the way.

The following are five different types of numbers:

1. Natural Numbers (N) - Natural numbers are positive integers from 1 to infinity. They're part of the numbers system. Natural numbers are also referred to as counting numbers. Positive integers such as 1, 2, 3, 4, 5, …… are called natural numbers. The symbol for natural numbers is ‘N’.
2. Whole Numbers (W) - Whole numbers are numbers that include zero and other natural integers. They are a subset of the real numbers and can be arranged on a number line. So, the whole number includes all positive integers from zero to infinity. They are denoted with the letter W and contain the following (0, 1, 2, 3, 4, …..).
3. Integers (Z) - An integer is a number that does not contain any decimal or fractional parts. It encompasses both negative and positive integers, including zero. For example -3, -2, 4, 5, 0. Integers are denoted with the letter Z.
4. Rational Numbers (Q) - A number r is called a rational number, if it can be written in the form p/q, where p and q are integers and q ≠ 0. Q = ½, ¾ are all rational numbers.
5. Irrational Numbers - A number s is called an irrational number, if it cannot be written in the form p/q , where p and q are integers and q ≠ 0.

Tips for Solving Exercise 1.1 class 9 chapter 1 Number Systems

NCERT solutions class 9 maths chapter 1 ex 1.1 are a great way to study the number systems. Here, we have provided some very useful tips to solve questions of ex 1.1. You can check them below.

1. Students are encouraged to read every number line provided in the NCERT solutions while also concentrating on the examples that provide simple explanations to solve the question logically.
2. Understanding rational numbers and irrational numbers are core concepts of this exercise as NCERT solutions class 9 maths chapter 1 ex 1.1 will help the students not only in preparing for their board exams, but also in preparing for other competitive exams.

Importance of Solving Ex 1.1 class 9 Maths chapter 1 Number Systems

Solving NCERT solutions class 9 maths chapter 1 ex 1.1  will give you a better understanding of questions of ex 1.1.

1. If you will gain a better comprehension of the concept related to the number system, you can solve questions in step by step manner.
2. NCERT solutions for class 9 maths chapter 1 ex 1.1 will assist students in revising all the questions in ex1.1.
3. These NCERT solutions comprise all the essential questions from the examination perspective to achieve high scores in the exam.
4. The selection of questions and solutions are accurate and based on the latest syllabus.

Frequently Asked Questions

Question 1. What is a rational number?

Answer 1. A number r is called a rational number, if it can be written in the form p/q, where p and q are integers and q ≠ 0. Q = ½, ¾ are all rational numbers.

Question 2. What is an integer number as defined in chapter 1 ex 1.1 class 9 maths?

Answer 2. An integer is a number that does not contain any decimal or fractional parts. It encompasses both negative and positive integers, including zero. For example -3, -2, 4, 5, 0. Integers are denoted with the letter Z.