Question

-7×-5×-9×-2 by properties

Answer 1

Answer : 630

Step by step explanation :

$- 7 \times ( - 5) \times ( - 9) \times ( - 2)$

Use the Rules of Signs. Multiplying an even number of negative factors equals a positive.

$= > 7 \times 5 \times 9 \times 2$

To make the calculation easier, first multiply the numbers that result in multiples of 10.

$= > 7 \times 10 \times 9$

Multiply the numbers.

$= > 70 \times 9$

Multiply the numbers.

$= > 630$