# Ex 9.1, 2 - Chapter 9 Class 7 Rational Numbers

Last updated at June 22, 2018 by Teachoo

Last updated at June 22, 2018 by Teachoo

Transcript

Ex 9.1, 2Write four more rational numbers in each of the following patterns: (i) (−3)/5, (−6)/10, (−9)/15, (−12)/20, ….. (−3)/5= (−3)/5 × 2/2 (−6)/10 = (−3)/5 × 3/3 (−9)/15 (−12)/20 = (−3)/5 × 4/4 So, these are equivalent fractions of (−3)/5 Thus, 4 more numbers in the same pattern are equivalent fractions of (−3)/5 (−3)/5 × 5/5 = (−3)/5 × 6/6 = (−3)/5 × 7/7 = (−3)/5 × 8/8 = ∴ 4 more numbers are (−𝟏𝟓)/𝟐𝟓, (−𝟏𝟖)/𝟑𝟎, (−𝟐𝟏)/𝟑𝟓, (−𝟐𝟒)/𝟑𝟓 Ex 9.1, 2Write four more rational numbers in each of the following patterns: (ii) (−1)/4, (−2)/8, (−3)/12, ….. (−1)/4 (−2)/8 (−3)/12 So, these are equivalent fractions of (−1)/4 Thus, 4 more numbers in the same pattern are equivalent fractions of (−1)/4 (−1)/4 × 4/4 = (−1)/4 × 5/5 = (−1)/4 × 7/7 = (−1)/4 × 8/8 = ∴ 4 more numbers are (−𝟒)/𝟏𝟔, (−𝟓)/𝟐𝟎, (−𝟔)/𝟐𝟒, (−𝟕)/𝟐𝟖 Ex 9.1, 2Write four more rational numbers in each of the following patterns: (iii) (−1)/6, 2/(−12), 3/(−18), 4/(−24), ….. We write the numbers as (−1)/6, (−2)/12, (−3)/18, (−4)/24, ….. (−1)/6 (−2)/12 (−3)/18 (−4)/24 So, these are equivalent fractions of (−1)/6 Thus, 4 more numbers in the same pattern are equivalent fraction of (−1)/6 (−1)/6 × 5/5 (−1)/6 × 6/6 (−1)/6 × 7/7 (−1)/6 × 8/8 ∴ 4 more numbers are (−𝟓)/𝟑𝟎, (−𝟔)/𝟑𝟔, (−𝟕)/𝟒𝟐, (−𝟖)/𝟒𝟖 Ex 9.1, 2Write four more rational numbers in each of the following patterns: (iv) (−2)/3, 2/(−3), 4/(−6), 6/(−9), ….. We write the numbers as (−2)/3, 2/(−3), (−4)/6, (−6)/9, ….. (−2)/3 2/(−3) (−4)/6 (−6)/9 So, these are equivalent fractions of (−2)/3 Thus, 4 more numbers in same pattern are equivalent fraction of (−2)/3 (−2)/3 × 4/4 (−2)/3 × 5/5 (−2)/3 × 6/6 (−1)/6 × 7/7 ∴ 4 more numbers are (−𝟖)/𝟏𝟐, (−𝟏𝟎)/𝟏𝟓, (−𝟏𝟐)/𝟏𝟖, (−𝟏𝟒)/𝟐𝟏

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.