Question
Find $(–15) – (–18)$
✓
Answer
$(–15) – (–18)$
$= (–15) + ($additive inverse of $–18)$
$= (–15) + (18)$
$= (–15) + (15) + (3)$
$= 0 + (3) = 3$
$= (–15) + ($additive inverse of $–18)$
$= (–15) + (18)$
$= (–15) + (15) + (3)$
$= 0 + (3) = 3$
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