# NCERT Solutions for Class 9 Maths Chapter 1 Number System

## NCERT Solutions Class 9 Maths Chapter 1 Number System - Free PDF

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Q1. Why is the Number System an important chapter of Class 9 NCERT Mathematics textbook?

Ans: Number Systems (Chapter 2) gives students an understanding of what are real numbers, rational numbers and irrational numbers. Mathematics is all about numbers and it is important to understand numbers first before getting into deeper concepts of Maths. It is crucial to have a conceptual understanding of this chapter to easily understand the upcoming chapters. Through this chapter, students will be able to simplify expressions consisting of rational and irrational numbers. It also teaches students how to represent numbers on the number line. Students will perform different operations based on rational and irrational numbers and learn how to classify whether a number is rational or irrational.

Q2. What are the prime advantages of NCERT Solutions for Class 9 Maths Chapter 1- Number Systems?

Ans: NCERT Solutions for Class 9 Maths Chapter 1 Number Systems will be a great help in solving and revising the chapter. Designed by the expert Maths teachers as per the latest NCERT guidelines, it will help students to clear all their doubts regarding the chapter. The NCERT Solutions include the solutions to the exercise problems given in a step-by-step manner Hence students will easily learn how to solve these problems and score well. It includes all the important concepts from the examination point of view. Students can avail the free PDF of NCERT Solutions for Class 9 Maths Chapter 1 on Vedantu’s site and learn the chapter without any inconvenience.

Q3. What is the difference between rational and irrational numbers?

Ans: Any number which can be expressed as the ratio of two integers is a rational number. For example, 2/6; -3/8, 5/10, etc. Students need to note that all integers are a rational number as it can be expressed as a ratio of two integers. For example, 5 is a rational number as 5= 5/1. Whereas, all the real numbers that cannot be expressed as a ratio of two integers are Irrational Numbers. For example, square root of 2, square root of 5, square root of 7, etc. The real number system is the combination of all the rational numbers as well as all the irrational numbers.