Question

Find the product, using suitable properties:15 × (–25) × (– 4) × (–10)

Answer 1

We know that a x b x c = b x a x c

15 × (–25) × (– 4) × (–10)

We will rearrange the sequence for easier calculation:

= (-10) x (-25) x (-4) x (15)

Multiplying by 10 is simply adding "0" to the number:

= 250 x (-4) x (15)

We know that 250 x 4 = 1000:

= - 1000 x 15

Multiplying by 1000 is simply adding 3 "0"s to the number:

= -15000

Answer:  -15000