Use the commutative and associative properties as needed to simplify the expression.

Question

(12 + a) + 13

  
(12 + a) + 13 = ​(Simplify your​ answer.)

Answer 1

12 + a + 13 (by the commutative property)

= (12 + 13) + a (by the associative property)

= 25 + a (by simplifying the addition)