$\"\"$

\

The statement is “ $\"\"$ ”.

\

$\"\"$ (Apply commutative property of addition: $\"\"$ )

\

$\"\"$ (Apply associative property of addition: $\"\"$ )

\

$\"\"$ (Add: $\"\"$ )

\

$\"\"$ (Add: $\"\"$ ) $\"\"$

\

The sum is $\"\"$ .