NCERT Solutions for Class 9 Maths Chapter 1 Number System

Download PDF

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

Bookmark added to your notes.
View Notes

Class 9 is when the rigour of academics begins, as it is the class right before the 10th board year and it is the time to get serious about our studies. What we learn in class 9 maths is fairly simple, but it is important to attain a good understanding of the same, because it acts as a base for mathematics, and even other subjects, in higher classes. For example, the basics of statistics that you will learn in chapter 14 will be helpful if you choose to take economics in class 11. Another example is number systems, which you will learn in NCERT class 9 maths chapter 1, and it is important to know this because you will use number systems in concepts of electronics if you choose physics, and further on in maths classes. Thus, it is incredibly important to find a good base in mathematics starting with the NCERT solution maths class 9 chapter 1, Number Systems. You can also download NCERT Solution for Class 9 Science, Maths solutions, and solutions of other subjects that are available on Vedantu only.

NCERT Solutions for Class 9 Maths Chapter 1 Number Systems part-1
Loading More Solutions...
FAQ (Frequently Asked Questions)

Q1. What all Comes Under the Purview of NCERT Maths Class 9 Chapter 1 Number Systems?

Ans. Under NCERT maths class 9 chapter 1 Number Systems, the topics covered include a short introduction about what number systems are using number lines, defining rational and irrational numbers using fractions, defining real numbers and also stating their decimal expansions. The chapter then comes back to the number line, so as to teach students how to represent real numbers on the number line. The chapter also shows students how to add, subtract, multiply and divide real numbers, or, in short, conduct operations on real numbers. The last topic in class 9 maths chapter 1 is a part of operations, it is called the laws of exponents for real numbers.

Q2. What are the Weightage Marks for Mathematics in Class 9?

Ans. The total mathematics paper in class 9 is 100 marks, like any other subject. Out of these 100 marks, 20 marks goes from internal assessments (pen and paper tests, multiple assessments, portfolios/project work and lab practicals for 5 marks each), and the remaining 80 marks are from the written test at the end of the school year. Out of these 80 marks, the chapter Number Systems comes for 8 marks, Algebra for 17 marks,  Coordinate Geometry for 4 marks, Geometry for 28 marks, Mensuration for 13 marks, and Statistics and Probability for 10 marks. All of these chapters’ respective marks total up to a cumulative 80 marks for the written paper.

3. How many sums are there in the NCERT Class 9 Chapter 1 Number System?

Answer: There are six exercises in the NCERT Class 9 Chapter 1 Number System. In the first exercise, Ex-1.1, there are 4 sums and in the second exercise, Ex-1.2, there are 3 sums. These first two exercises deal with the basic concepts of the number system, such as identifying the features of a rational number or an irrational number and locating them on the number line. In the third exercise, Ex-1.3, there are 9 sums, and most of them have sub-questions. The fourth exercise, Ex-1.4, comprises 2 sums, that deal with successive magnification for locating a decimal number on the number line. The fifth exercise, Ex-1.5, consists of 5 sums, on the concept of rationalization. The sixth exercise, Ex-1.6, consists of 3 sums, that have sub-questions. The sums in this exercise will require you to find the various roots of numbers.