CBSE Class 9 Mathematics – Number Systems

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Study Materials

9th

9th - Mathematics

Number Systems

Chapter Overview

The chapter 'Number Systems' introduces students to the extended classification of numbers beyond natural and whole numbers. It covers rational and irrational numbers, their representation on the number line, operations involving real numbers, and laws of exponents for real numbers.

Important Keywords

  • Natural Numbers: Counting numbers starting from 1.
  • Whole Numbers: Natural numbers including 0.
  • Integers: Whole numbers and their negatives.
  • Rational Numbers: Numbers expressed as p/q, where q ≠ 0.
  • Irrational Numbers: Numbers that cannot be expressed as p/q.
  • Real Numbers: All rational and irrational numbers combined.

Detailed Notes

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