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NCERT Exemplar Solutions Class 7 Mathematics Solutions for Integers - Exercise in Chapter 1 - Integers

Question 207 Integers - Exercise

[(– 8) × (– 3)] × (– 4) is not equal to

(a) (– 8) × [(– 3) × (– 4)] (b) [(– 8) × (– 4)] × (– 3)

(c) [(– 3) × (– 8)] × (– 4) (d) (– 8) × (– 3) – (– 8) × (– 4)

Answer:

(d) (– 8) × (– 3) – (– 8) × (– 4)[(– 8) × (– 3)] × (– 4)

= (– 8) × [(– 3) × (– 4)]

= [(– 8) × (– 4)] × (– 3)

= [(– 3) × (– 8)] × (– 4

But, [(– 8) × (– 3)] × (– 4) ≠ [(– 8) × (– 3)] × (– 4)

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