Question

Обчисліть зручним способом:
1) (-2)(-64)*(-5)=


2) (-25)*78*(-4)=


3) -1,25*(-20)*(-8)*(-5)=​

Answer 1

$( - 2) \times ( - 64) \times ( - 5) = 10 \times ( - 64) = - 640$

$( - 25) \times 78 \times ( - 4) = 100 \times 78 = 7800$

$- 1.25 \times ( - 20) \times ( - 8) \times ( - 5) = - 1.25 \times ( - 8) \times ( - 20) \times ( - 5) = 10 \times 100 = 1000$