You can put this solution on YOUR website! 18 + 24 + 2 follows the commutative property since you're real numbers obey the commutative property. For example, 18 + 24 + 2 = 18 + 2 + 24 = 24 + 18 + 2 = ... = 44.
The commutative property is very rarely used in elementary mathematics except when doing mental math, such as 87 + 1043 + 13 = 87 + 13 + 1043 = 100 + 1043 = 1143.
Later you'll see that other mathematical objects, such as complex numbers, vector sums and so forth also obey commutative property. Interestingly, the dot product of two vectors is commutative, but the cross product is anticommutative, i.e. .
