Chapter Explanations
Class 9 Mathematics Number Systems – Chapter Explanation for Class 9 students, prepared by the teachers at Shubham Foundation Classes, Karnal. These chapter explanations follow the latest CBSE syllabus and NCERT textbook, and cover the points that are most often asked in school tests and board exams. Read the key points below, then download the complete 7-page PDF for free.
Key points: Number Systems – Chapter Explanation
- Rational numbers can be written as p/q (q ≠ 0); their decimal expansion is terminating or repeating.
- Irrational numbers have non-terminating, non-repeating decimals (e.g. √2, π).
- Rationalising the denominator: multiply numerator and denominator by the conjugate.
- Laws of exponents: aᵐ·aⁿ = aᵐ⁺ⁿ, (aᵐ)ⁿ = aᵐⁿ, aᵐ/aⁿ = aᵐ⁻ⁿ.
Download the PDF
- Class
- Class 9
- Subject
- Mathematics
- Type
- Chapter Explanations
- Pages
- 7
- Format
- Price
- Free
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How to use these notes
- Read the chapter once in your NCERT textbook.
- Go through these chapter explanations and mark anything you find difficult.
- Solve the textbook exercises, then revise from the notes again before your test.
Stuck on a question? Students of Shubham Foundation Classes can ask their teacher in class, or contact the institute.