Question

Evaluate the following expression. −8 × (−10) −7× 1/−1

Answer 1

87

Step-by-step explanation:

`-8\left(-10\right)-7 * (1)/(-1)=87\\\\\mathrm{Apply\:rule}\:-\left(-a\right)=a\\\\=8* \:10-7* (1)/(-1)\\\\8* \:10=80\\\\7* (1)/(-1)=-7\\\\=80-\left(-7\right)\\\\\mathrm{Apply\:rule}\:-\left(-a\right)=a\\\\=80+7\\\\=87`

Answer 2

The correct evaluation of the given mathematical expression, −8 × (−10) −7× 1/−1, when executed according to the order of operations, is 87.

Step-by-step explanation:

Let's evaluate your expression step-by-step. We start with the multiplication and division operations, as according to the order of operations BIDMAS or PEMDAS (Brackets, Indices, Division and Multiplication, Addition and Subtraction).

First, −8 × (−10) equals 80 because a negative number times a negative number equals a positive number.

Secondly, −7× 1/−1 equals 7 because again a negative divided by a negative turns positive.

Finally, we do the addition: 80 + 7 equals 87.

So, −8 × (−10) −7× 1/−1 equals 87.

Learn more about Order of Operations