Mr welor leaves work at 8: 40 he leaves work 50 minutes before he arrives what time does he arrive

He arrives at 9:30 because if you take 8:40 (when dealing with time I like to think of it as a whole number so 8:40 would become 840) then just add 50 minutes to 8:40 (or 840+50 which equals 890 also know as 9:30 because you have to subtract 60 from 90 (because 60 is the limit in time (well technically 59 is)) then add one to 8 like so, which equals 9:30 Enjoy!=)

He would arrive at 9:30
8:40 + 0:50=9:30
8:40+0:20=9:00
so just add the left over 0:30

The correct answer is addition