NCERT Book Class 9 Maths Chapter 3 The World of Numbers is available here to read online and download as a free PDF. This chapter is from Mathematics, the latest NCERT Class 9 Maths textbook for the 2026-27 session published by the National Council of Educational Research and Training (NCERT). The World of Numbers is Chapter 3 of 8 in Mathematics. On this page you can read the complete chapter, download the Class 9 Maths Chapter 3 PDF and the full Mathematics book, and find the NCERT Solutions for this chapter.
NCERT Class 9 Maths (Mathematics) Chapter 3 The World of Numbers PDF
Download the NCERT Class 9 Maths Mathematics Chapter 3 The World of Numbers PDF from the links below. You can get this single chapter, or the complete Class 9 Maths NCERT book, both for free.
NCERT Class 9 Maths Chapter 3 The World of Numbers PDF – Click Here To Download The Chapter PDF
NCERT Class 9 Maths Mathematics Full Book PDF – Click Here To Download The Complete Book PDF
Read NCERT Class 9 Maths Chapter 3 The World of Numbers Online
You can read the complete Chapter 3 – The World of Numbers – of the NCERT Class 9 Maths book (Mathematics) online below, and download the PDF using the link above.
NCERT Book Class 9 Mathematics Chapter 3 The World of Numbers View Download
Topics Covered in Class 9 Maths Chapter 3 The World of Numbers
In The World of Numbers – Chapter 3 of the NCERT Class 9 Maths book Mathematics – you will study: real numbers, rational and irrational numbers, representing numbers on the number line, decimal expansions, operations on real numbers, laws of exponents for real numbers. Reading this chapter PDF helps you understand these topics clearly and prepare for your Class 9 Maths exams.
Chapter 3 of 8 – NCERT Class 9 Maths Mathematics
The World of Numbers is Chapter 3 of 8 chapters in the NCERT Class 9 Maths book Mathematics. Move to the previous or next chapter here.
- Previous: Chapter 2 Introduction to Linear Polynomials
- Next: Chapter 4 Exploring Algebraic Identities
- All Chapters: NCERT Class 9 Maths (Mathematics)
How to Download NCERT Class 9 Maths Chapter 3 PDF?
You can download the NCERT Class 9 Maths The World of Numbers PDF in a few simple steps.
- Open this page (you can search NCERT Class 9 Maths Mathematics Chapter 3 aglasem to reach here).
- Click the Click Here To Download The Chapter PDF link above.
- The Chapter 3 The World of Numbers PDF opens in the viewer; click the download option to save it to your device.
- To get all chapters, use the Download The Complete Book PDF link for Mathematics.
NCERT Class 9 Maths Book – Mathematics (All Chapters)
Mathematics is the NCERT textbook for Class 9 Maths in the 2026-27 session. Besides The World of Numbers, you can read and download the other chapters of NCERT Class 9 Maths below.
- Chapter 1 Orienting Yourself: The Use of Coordinates
- Chapter 2 Introduction to Linear Polynomials
- Chapter 3 The World of Numbers
- Chapter 4 Exploring Algebraic Identities
- Chapter 5 I’m Up and Down, and Round and Round
- Chapter 6 Measuring Space: Perimeter and Area
- Chapter 7 The Mathematics of Maybe: Introduction to Probability
- Chapter 8 Predicting What Comes Next: Exploring Sequences and Progressions
NCERT Solutions for Class 9 Maths The World of Numbers
After reading the chapter, solve the exercise questions. You can get step-by-step answers at NCERT Solutions for Class 9 Maths, and study the same book in Hindi medium at NCERT Class 9 Maths Book in Hindi.
NCERT Books for Class 9 (All Subjects)
The subject-wise NCERT books for Class 9 (2026-27) are as follows.
- NCERT Book Class 9 English
- NCERT Book Class 9 Hindi
- NCERT Book Class 9 Maths
- NCERT Book Class 9 Sanskrit
- NCERT Book Class 9 Science
- NCERT Book Class 9 Social Science
NCERT Books (Class 1 to 12)
All class-wise NCERT books of the National Council of Educational Research and Training are as follows.
- NCERT Books for Class 1
- NCERT Books for Class 2
- NCERT Books for Class 3
- NCERT Books for Class 4
- NCERT Books for Class 5
- NCERT Books for Class 6
- NCERT Books for Class 7
- NCERT Books for Class 8
- NCERT Books for Class 9
- NCERT Books for Class 10
- NCERT Books for Class 11
- NCERT Books for Class 12
NCERT Class 9 Maths Chapter 3 The World of Numbers – An Overview
The key details of this NCERT chapter are as follows.
| Aspects | Details |
|---|---|
| Board / Publisher | NCERT (National Council of Educational Research and Training) |
| Used By | CBSE and State Boards |
| Class | Class 9 |
| Subject | Maths |
| Book | Mathematics |
| Chapter Number | Chapter 3 (of 8) |
| Chapter Name | The World of Numbers |
| Session | 2026-27 (New, Updated) |
| Format | PDF (read online & free download) |
| Complete Book | NCERT Class 9 Maths (Mathematics) |
| All Class 9 Books | NCERT Books for Class 9 |
| NCERT Solutions | NCERT Solutions for Class 9 Maths |
| Official Website | ncert.nic.in |
NCERT Class 9 Maths Chapter 3 The World of Numbers – FAQs
What is Chapter 3 of NCERT Class 9 Maths?
Chapter 3 of NCERT Class 9 Maths is The World of Numbers, from the textbook Mathematics. It is one of 8 chapters in the book, and you can read it online and download the PDF for free from this page.
What topics are covered in Class 9 Maths The World of Numbers?
The key topics covered in The World of Numbers (Chapter 3 of Mathematics) are: real numbers, rational and irrational numbers, representing numbers on the number line, decimal expansions, operations on real numbers, laws of exponents for real numbers.
Is this the latest NCERT book for the 2026-27 session?
Yes. The World of Numbers here is from the new and updated NCERT Class 9 Maths textbook (Mathematics) for the 2026-27 academic session, as prescribed by NCERT.
Which book is Class 9 Maths Chapter 3 The World of Numbers from?
Chapter 3 The World of Numbers is from Mathematics, the NCERT Class 9 Maths textbook. The book has 8 chapters in total.
Where can I find NCERT Solutions for Class 9 Maths The World of Numbers?
You can find step-by-step answers to the exercise questions at NCERT Solutions for Class 9 Maths.
Can I read Class 9 Maths Chapter 3 online without downloading?
Yes. The complete Chapter 3 The World of Numbers is embedded on this page, so you can read it online for free, and download the PDF only if you want an offline copy.
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