>>It will be rejected at the border for not complying with US standards.
>>
>>I haven't heard anyone here say "minus 10" or any such thing. There's only a "negative 10". I wonder how do they read "-(-10)" - as "negative negative ten"?
>
>You haven't heard anyone say "minus 10"? Maybe that's because you live in Virginia.

Not temperature, numbers. Listen to students talking math. I haven't heard them say "minus 10", only "negative 10".