I am a bit confused. I understood the problem to be arriving at the result of 100 using all ten numbers, including zero (0). Yet all of the solutions I have seen use only 1 through 9.

It appears to me that if the "0" is included, the solution will probably involve decimal solutions, as adding 0 to any addition of integers does not affect the result.

Possible I misunderstood the original posting.

Jack