So, there is no chance to answer the original question incorrectly by picking any specific order.

Logically speaking, the original problem has just one interpretation, i hope you would agree it is by no means ambiguous:

((a / b / c) = a + b + c) | ((a / c / b) = a + b + c) | ((b / a / c) = a + b + c) | ((b / c / a) = a + b + c) | ((c / a / b) = a + b + c) | ((c / b / a) = a + b + c) | ...(other 6 combinations) = true

This interpretation would indeed find all possible solutions to the problem, accounting for any potential ambiguity in the division order.