The Associative Laws (or Properties) of Addition and Multiplication

Example 1:

$\begin{array}{l}\left(2+3\right)+5=5+5=10\\ 2+\left(3+5\right)=2+8=10\end{array}$

Example 2:

$\begin{array}{l}\left(5\cdot 7\right)\cdot 6=35\cdot 6=210\\ 5\cdot \left(7\cdot 6\right)=5\cdot 42=210\end{array}$