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Q. 44.1( 48 Votes )

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

Class 7th NCERT Mathematics 1. Integers

Answer :

In this question, we have

- 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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PREVIOUSDetermine the integer whose product with (-1) is (a) – 22 (b) 37 (c) 0 NEXTFind the product, using suitable properties:(a) 26 × (– 48) + (– 48) × (–36)(b) 8 × 53 × (–125)(c) 15 × (–25) × (– 4) × (–10)(d) (– 41) × 102(e) 625 × (–35) + (– 625) × 65(f) 7 × (50 – 2)(g) (–17) × (–29)(h) (–57) × (–19) + 57

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