Question
Find the product, using suitable properties:
(a) 26 × (− 48) + (− 48) × (− 36)
(b) 15 × (− 25) × (− 4) × (− 10)
[4 MARKS]
Answer: Option A
:
Each option: 2 Marks
(a) 26 × (−48) + (−48) × (−36)
= (−48) × 26 + (−48) × (−36)
(∵ (b × a = a × b))
= (−48) [26 − 36] (a × b + a × c) = a (b + c)
= (−48) × (−10) = 480
(b) 15 × (−25) × (−4) × (−10)
= 15 × [(−25) × (−4)] × (−10)
= 15 × [100] × (−10)
= 15 × (−1000) = −15000
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:
Each option: 2 Marks
(a) 26 × (−48) + (−48) × (−36)
= (−48) × 26 + (−48) × (−36)
(∵ (b × a = a × b))
= (−48) [26 − 36] (a × b + a × c) = a (b + c)
= (−48) × (−10) = 480
(b) 15 × (−25) × (−4) × (−10)
= 15 × [(−25) × (−4)] × (−10)
= 15 × [100] × (−10)
= 15 × (−1000) = −15000
Was this answer helpful ?
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