# Ex 1.1, 5 - Chapter 1 Class 8 Rational Numbers

Last updated at Sept. 21, 2018 by Teachoo

Last updated at Sept. 21, 2018 by Teachoo

Transcript

Ex 1.1, 5 Name the property under multiplication used in each of the following. (i) (−4)/5 × 1 = 1 × (−4)/5=(−4)/5 (−4)/5 × 1 = 1 × (−4)/5=(−4)/5 It is the form of a × 1 = 1 × a = a ∴ This is multiplicative identity 1. Ex 1.1, 5 Name the property under multiplication used in each of the following. (ii) (−13)/17 × (−2)/7= (−2)/7 × (−13)/17 (−13)/17 × (−2)/7= (−2)/7 × (−13)/17 It is the form of a × b = b × a ∴ This is commutativity. Ex 1.1, 5 Name the property under multiplication used in each of the following. (iii) (−19)/29 × 29/(−19) = 1 (−19)/29 × 29/(−19) = 1 It is the form of 𝑎/𝑏 × 𝑏/𝑎 = 1 ∴ This is multiplicative inverse.

Ex 1.1

Ex 1.1, 1 (i)

Ex 1.1, 1 (ii)

Ex 1.1, 2 (i) Important

Ex 1.1, 2 (ii)

Ex 1.1, 2 (iii)

Ex 1.1, 2 (iv)

Ex 1.1, 2 (v)

Ex 1.1, 3

Ex 1.1, 4 (i) Important

Ex 1.1, 4 (ii)

Ex 1.1, 4 (iii)

Ex 1.1, 4 (iv)

Ex 1.1, 4 (v)

Ex 1.1, 4 (vi)

Ex 1.1, 5 Important You are here

Ex 1.1, 6

Ex 1.1, 7

Ex 1.1, 8

Ex 1.1, 9

Ex 1.1, 10 (i) Important

Ex 1.1, 10 (ii)

Ex 1.1, 10 (iii)

Ex 1.1, 11 Important

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.