# Ex 9.2, 1 (vii) - Chapter 9 Class 7 Rational Numbers

Last updated at Sept. 3, 2021 by Teachoo

Last updated at Sept. 3, 2021 by Teachoo

Transcript

Ex 9.2, 1 Find the sum : (vii) −21/3 + 4 3/5 −21/3 + 4 3/5 = − (2+ 1/3) + (4+ 3/5) = − ((2 × 3 + 1)/3) + ((4 × 5 + 3)/5) = − ((6 + 1)/3) + ((20 + 3)/5) = (−7)/3 + 23/5 = (− 7 × 5 + 23 × 3)/(3 × 5) = (− 35 + 69)/(15 ) = (69 − 35)/(15 ) = 𝟑𝟒/𝟏𝟓

Ex 9.2

Ex 9.2, 1 (i)
Important

Ex 9.2, 1 (ii)

Ex 9.2, 1 (iii)

Ex 9.2, 1 (iv)

Ex 9.2, 1 (v)

Ex 9.2, 1 (vi)

Ex 9.2, 1 (vii) You are here

Ex 9.2, 2 (i) Important

Ex 9.2, 2 (ii)

Ex 9.2, 2 (iii)

Ex 9.2, 2 (iv)

Ex 9.2, 2 (v)

Ex 9.2, 3 (i) Important

Ex 9.2, 3 (ii)

Ex 9.2, 3 (iii)

Ex 9.2, 3 (iv)

Ex 9.2, 3 (v)

Ex 9.2, 3 (vi)

Ex 9.2, 4 (i) Important

Ex 9.2, 4 (ii)

Ex 9.2, 4 (iii)

Ex 9.2, 4 (iv)

Ex 9.2, 4 (v)

Ex 9.2, 4 (vi)

Ex 9.2, 4 (vii)

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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.