## Task 2

Subtract and justify!

$$
\begin{aligned}
& 66-25=41, \text { because } 41+25=66 \\
& 78-42= \\
& 96-53= \\
& 84-12=
\end{aligned}
$$
$78-42=36$, because $36+42=78 ; 96-53=43$, because $43+53=96 ; 84-12=72$, because $12+72=84$