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Question 1 - Think and Reflect (Page 49) - Rational Numbers - Chapter 3 Class 9 - The World of Numbers (Ganita Manjari I)
Last updated at May 9, 2026 by Teachoo
Class 9
Chapter 3 Class 9 - The World of Numbers (Ganita Manjari I)
- The Human Need to Count
- Exercise Set 3.1
- The Revolution of ΕhΕ«nya
- Integers
- Exercise Set 3.2
-
Rational Numbers
- Exercise Set 3.3
- Rational Numbers on the Number Line
- Absolute Value of a Rational Number
- Rational Numbers between two Rational numbers
- Exercise Set 3.4
- Irrational Numbers
- Construction of Length βn on Number line
- The Story of Pi (Ο) and Madhavaβs Infinite Series
- Real Numbers & Imaginary Numbers
- Decimal Expansion of Real Numbers
- Magic of Cyclic Numbers
- Constructing a Square Root Spiral
- Exercise Set 3.5
- End-of-Chapter Exercises
Transcript
Question 1 - Think and Reflect (Page 49) While adding or subtracting two rational numbers having different denominators, how will you make the denominators equal? Letβs take an example Add π/π & π/π We use two methods to solve this Method 1 1/2 + 1/3 = (1 Γ 3 + 1 Γ 2)/(2 Γ 3) = (3 + 2)/6 = 5/6 Method 2 1/2 + 1/3 First, we make denominators same. Common denominator. = LCM of 2 & 3 = 2 Γ 6 = 6 β΄ 1/2 = 1/3 Thus, 1/2 + 1/3 = 3/6 + 2/6 = (3 + 2)/6 = π/π We will be using Method 1 mostly to add or subtract fractions
