Use the commutative property of addition to fill in the missing number.
$1+9=9$1+9=9$+$+$\editable{}$
Use the commutative property of addition to fill in the missing number.
Use a distributive property to rewrite $3\left(6+5\right)$3(6+5).
Do not evaluate the expression.
Use the commutative property of addition to fill in the missing number.