Operating order

[Former user]

Look at this: (1/8+1/9/+1/10) = 0.13611111111111111111

it makes no sense. It should be:

8.92561983471074380165

[Tey']

Not really.

I'm pretty sure there's a typo in your expression anyway, because even when using parenthesis to force operation order, there's no way to find your result. Also, the /+ part is unusual (yet valid).