Advertisements
Advertisements
प्रश्न
Find the product, using suitable properties:
(− 57) × (− 19) + 57
Advertisements
उत्तर
(−57) × (−19) + 57
= 57 × 19 + 57 × 1
= 57 [19 + 1] (a × b) + (a × c) = a × (b + c)
= 57 × 20 = 1140
संबंधित प्रश्न
Find the product, using suitable properties:
15 × (− 25) × (− 4) × (− 10)
Find the product, using suitable properties:
625 × (− 35) + (− 625) × 65
Find the following product: (– 25) × 37 × 4
Find the following products: (– 18) × (– 10) × 9
Find 16 × 12.
Find 52 × (– 8) + (–52) × 2
(–157) × (–19) + 157 = ______.
If Δ is an operation such that for integers a and b we have a Δ b = a × b – 2 × a × b + b × b (–a) × b + b × b then find 4 Δ (–3) Also show that 4 ∆ (–3) ≠ (–3) ∆ 4.
A multistorey building has 25 floors above the ground level each of height 5 m. It also has 3 floors in the basement each of height 5 m. A lift in building moves at a rate of 1 m/s. If a man starts from 50 m above the ground, how long will it take him to reach at 2nd floor of basement?
If Δ is an operation such that for integers a and b we have a Δ b = a × b – 2 × a × b + b × b (–a) × b + b × b then find (–7) Δ (–1). Also show that (–7) Δ (–1) ≠ (–1) Δ (–7).
