If $p=-2,\ q=-1$ and $r=3$, find the value of $p-q-r$.
Given: $p=-2,\ q=-1$ and $r=3$.
To do: To find the value of $p-q-r$.
Solution:
As given, $p=-2,\ q=-1$ and $r=3$.
$\therefore p-q-r$
$=-2-( -1)-3$
$=-2+1-3$
$=-5+1$
$=-4$
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