Question
Find the product, using suitable properties:
(a) 26 × (− 48) + (− 48) × (− 36)
(b) 15 × (− 25) × (− 4) × (− 10)
[4 MARKS]
(a) 26 × (− 48) + (− 48) × (− 36)
(b) 15 × (− 25) × (− 4) × (− 10)
[4 MARKS]
Answer:
:
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 ?
:
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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