## Prealgebra (7th Edition)

$1$
$\frac{-6}{-6}=1$ We know this, because any number divided by itself equals one. (i.e. $\frac{4}{4}=1, \frac{221}{221}=1, \frac{a}{a}=1$) We also know that since there are an even number of negative signs, the answer will be positive.