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NCERT Solutions for Class 9 Maths Chapter 1 Number Systems

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The first chapter of NCERT Class 9th talks about the basic number system segregated into Whole numbers, Rational numbers, Irrational numbers and Integers. Various theorems and concepts contributed by eminent mathematicians have been explained in the chapter to describe the theorems' origin. Ways to determine the decimal expansion, the process of successive magnification has been introduced. Further, the chapter also aims to educate the students in detail about the various laws concerning rational and irrational numbers. The chapter ends with explaining the concept of square roots by solving denominator equations.

  • Meaning and Representation of Sets.
  • The chapter begins with a simple yet significant part of the maths subject: numbers and their systems.
  • Numbers have been sub-divided into several categories: whole numbers, natural numbers, rational and irrational numbers.
  • The chapter shows activities through which the number of systems can be easily understood one after the other.
  • Examples have been given in the chapter to explain the equivalent rational numbers.
  • By using true and false statements, the meaning of integers has been clearly stated.
  • The theorems are often hard to remember, so the chapter mentions the origin of theorems and mathematicians who defined them.
  • Pythagoras was the first mathematician to discover that there were numbers other than rational numbers.
  • In addition to Pythagoras' theorem, two German mathematicians highlighted the points in each number line.
  • The method of solving decimal expansion and the terminating factors have further been explained.
  • Aryabhata, the Indian mathematician, played a key role in maths by finding the value of pie.
  • Examples have also been discussed in the section the square roots and cube roots.
  • In the end, the chapter briefs the rationalisation of the denominator.

 

 

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Frequently Asked Question

 

Q. Do I need to practice all questions provided in NCERT Solutions Class 9 Maths Chapter 1 Number Systems?

A. Practicing the NCERT Solutions Class 9 Maths Number systems exercises will help in exploring the number system in a better way. The NCERT Solutions for Class 9 Maths will also provide a good insight into the solving of problems. 

Q. Why are Class 9 Maths NCERT Solutions Chapter 1 Number System important?

A. The number system chapter deals with rational and irrational numbers, real numbers, and their decimal form, therefore making NCERT solutions important for all examinations. 

Q. What are the Important Topics covered in NCERT Solutions Class 9 Maths Chapter 1 Number system?

A. The NCERT Solutions Class 9 Maths Chapter 1 deals with integers, real numbers, rational and irrational numbers. Other than this the important topics covered are real numbers, the law of exponents in the case of real numbers, and how to differentiate between rational and irrational numbers.

Q. How can students utilize NCERT Solutions Class 9 Maths Chapter 1 effectively?

A. All students should first practice these examples to understand the logic and problem-solving techniques. Students should try to solve as many exercise questions as they can. CBSE itself recommends NCERT Solutions for the board exam preparation. 

Also See
NCERT Solutions For Class 9 Maths Chapter 2 Polynomials NCERT Solutions For Class 9 Maths Chapter 3 Coordinate Geometry NCERT Solutions For Class 9 Maths Chapter 4 The Linear Equations in Two Variables
NCERT Solutions For Class 9 Maths Chapter 5 Introduction to Euclid’s Theory NCERT Solutions For Class 9 Maths Chapter 6 Lines and Angles NCERT Solutions For Class 9 Maths Chapter 7 Triangles
NCERT Solutions For Class 9 Maths Chapter 8 Quadrilaterals NCERT Solutions For Class 9 Maths Chapter 9 The Areas of Parallelograms and Triangles NCERT Solutions For Class 9 Maths Chapter 10 Circles
NCERT Solutions For Class 9 Maths Chapter 11 Constructions NCERT Solutions For Class 9 Maths Chapter 12 Heron’s Formula NCERT Solutions For Class 9 Maths Chapter 13 Surface Areas and Volumes
NCERT Solutions For Class 9 Maths Chapter 14 Statistics NCERT Solutions For Class 9 Maths Chapter 15 Probability

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