SOLUTION: Ben left his house and traeled for 1 hour and 20 min. Arrived at grandmother's house at 1:50 p.m. What time did Ben leave his house?

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Question 840583: Ben left his house and traeled for 1 hour and 20 min. Arrived at grandmother's house at 1:50 p.m. What time did Ben leave his house?
Answer by LinnW(1048) About Me  (Show Source):
You can put this solution on YOUR website!
From 1:50 we need to back up ( 60 + 20 ) or 80 minutes
Backing up 50 minutes takes us to 1:00.
We need to continue back another 30 minutes which
takes us to 12:30