Ex 1.3, 5 - Chapter 1 Class 7 Integers - Part 3

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Ex 1.2, 5 Find the product, using suitable properties: (c) 15 × (–25) × (– 4) × (–10) Rough We multiply 25 & 4 as 25 × 4 = 100 ends with 0 15 × (−25) × (−4) × (−10) = 15 × [(−25) × (−4)] × (−10) = 15 × [25 × 4] × (−10) = 15 × 100 × (−10) = −15000

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo