#### Answer

(a)
$$8 \times (-1) = -8
\\88 \times (-1) = -88
\\888 \times (-1) = -888$$
(b)
$$-8 \times (-1) = 8
\\-88 \times (-1) = 88
\\-888 \times (-1) = 888$$
When $-1$ is multiplied to a signed number, the product is the signed number's opposite or additive inverse.

#### Work Step by Step

(a) Product of a positive number and $-1$
examples:
$$8 \times (-1) = -8
\\88 \times (-1) = -88
\\888 \times (-1) = -888$$
(b) Product of a negative number and $-1$
examples:
$$-8 \times (-1) = 8
\\-88 \times (-1) = 88
\\-888 \times (-1) = 888$$
From the examples above, it can be seen that when $-1$ is multiplied to a signed number, the product is the signed number's opposite or additive inverse.