Learn All Concepts of Chapter 1 Class 9 - FREE. Check - Chapter 1 Class 9 Maths

Last updated at Sept. 5, 2020 by Teachoo

Transcript

Find 3 rational numbers between π/π and π/π Since numbers donβt have the same denominator We take denominator as LCM of π/π and π/π i.e. 20 So, numbers are 1/4 = 1/4 Γ 5/5 & 1/5 = 1/5 Γ 4/4 So, now we need to find 3 rational numbers between 4/20 and 5/20 Since have to find 3 rational numbers, we multiply the numbers by 4/4 4/20 = 4/20 Γ 4/4 & 5/20 = 5/20 Γ 4/4 Thus, 3 Rational numbers between 1/4 & 1/5 are 17/80 , 18/80 , 19/80

Chapter 1 Class 9 Number Systems

Concept wise

- Rational numbers - Definition
- Finding rational number between two numbers
- Irrational Numbers
- Simplifying real numbers
- Rationalising
- Laws of exponents
- Finding decimal expansion
- Expressing decimal in p/q
- Classifiying rational/irrational
- Finding irrational numbers b/w two numbers
- Real numbers on a number line

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.