Question

Subtract $-8$ from $-15$.

Answer 1

Find the value of $(-15)-(-8)$:

To subtract an integer $b$ from another integer $a$, we add the additive inverse of $b$ to $a$.

So, $a-b=a+(-b)$

The additive inverse of $-8$ is $8$.

So, $(-15)-(-8)$$=(-15)+8$

To add a negative and a positive integer, we subtract the absolute values of both integers and put the sign of the number with a greater absolute value to the result

So, $(-15)+8$ $=-7$

Hence, if we subtract $-8$ from $-15$, we will get $-7$.