Chapter 1 number system class 9 delves into the principles covered under the topic of the number system . Vedantu offers an expert-curated NCERT answer for CBSE Class 9 Chapter 1. To ace your preparations, get the NCERT solution supplied by our professionals. The freely available number system class 9 PDF offers step-by-step solutions to the NCERT practice problems. The NCERT solutions maths class 9 PDF for chapter 1 contains the answers to all the Class 9 maths syllabus questions. CBSE Class 9 Maths Notes Chapter 1 Number Systems Pdf free download is part of Class 9 Maths Notes for Quick Revision. Here we have given NCERT Class 9 Maths Notes Chapter 1 Number Systems. NCERT Textbook Solutions for Class 9 Maths Chapter 1 Number Systems updated for New Session 2025-26 in Hindi and English Medium. NCERT 9th Mathematics textbook chapter 1 introduces the concept of real numbers, including rational and irrational numbers and explains their properties in detail. Introduction to number system class 9 The collection of numbers is called the number system . These numbers are of different types such as natural numbers, whole numbers, integers, rational numbers and irrational numbers. Let us see the table below to understand with the examples.