Commutative property: when you have to solve a sum, it does not matter the order in which you place your addends, since you will always get the same result.
We have then:
((40) + (185)) + (240) = 465
(240) + ((40) + (185)) = 465
answer:
Form 1:
((40) + (185)) + (240) = 465
Form 2:
(240) + ((40) + (185)) = 465
