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Starting from (− 1) × 5, Write Various Products Showing Some Pattern to Show (− 1) × (− 1) =1. - CBSE Class 7 - Mathematics

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Question

Starting from (− 1) × 5, write various products showing some pattern to show (− 1) × (− 1) =1.

Solution

−1 × 5 = −5

−1 × 4 = −4 = − 5 + 1

−1 × 3 = −3 = − 4 + 1

−1 × 2 = −2 = − 3 + 1

−1 × 1 = −1 = − 2 + 1

−1 × 0 = 0 = − 1 + 1

Therefore, −1 × (−1) = 0 + 1 = 1

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APPEARS IN

 NCERT Solution for Mathematics for Class 7 (2018 to Current)
Chapter 1: Integers
Ex. 1.30 | Q: 4 | Page no. 21
Solution Starting from (− 1) × 5, Write Various Products Showing Some Pattern to Show (− 1) × (− 1) =1. Concept: Properties of Multiplication of Integers - Multiplicative Identity.
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