That’s the way I learned it but to be even more correct and not to introduce bias whenever it is truly _ 50 (Not 501 or 50001) you round to the nearest even.
For example,
350 rounds up to 400 because 4 is even
450 rounds down to 400, not up to 500 (because 5 is odd)
My kids would go bats if I tried to teach them that ... except for Patrick, who would memorize it and then try to apply it to all sorts of irrelevant situations.
How are you doing in the snow? We’re out of beer, wine, and club soda. My husband is getting restive.