Last updated at Dec. 8, 2021 by

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Ex 2.2, 7 Match the following: (i) 425 × 136 = 425 × (6 + 30 + 100) (ii) 2 × 49 × 50 = 2 × 50 × 49 (iii) 80 + 2005 + 20 = 80 + 20 + 2005 (a) Commutatively under multiplication (b) Commutatitively under addition (c) Distributivity of multiplication over addition Note: Commutatively under multiplication: a × b = b × a Similarly, a × b × c = a × c × b = b × c × a Commutatively under addition: a + b = b + a Similarly, a + b + c = c + b + a = c + a + b Distributivity of multiplication over addition: a × (b + c) = a × b + a × c Similarly, a × (b + c + d) = a × b + a × c + a × d

Ex 2.2

Ex 2.2, 1

Ex 2.2, 2 (a) Important

Ex 2.2, 2 (b)

Ex 2.2, 2 (c) Important

Ex 2.2, 2 (d) Important

Ex 2.2, 2 (e)

Ex 2.2, 2 (f) Important

Ex 2.2, 3 (a)

Ex 2.2, 3 (b) Important

Ex 2.2, 3 (c)

Ex 2.2, 3 (d) Important

Ex 2.2, 4 (a)

Ex 2.2, 4 (b) Important

Ex 2.2, 4 (c) Important

Ex 2.2, 4 (d)

Ex 2.2, 5 Important

Ex 2.2, 6 Important

Ex 2.2, 7 You are here

About the Author

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.