Unit 3 · Measurement and Data
"Twenty to Midnight" — How Long Was the Train Trip?
Lesson 6 of 12
About this lesson
Liu Wei boards a train at twenty to midnight and gets off at 2:45 pm the next day. The phrase 'twenty to midnight' is a classic trap — students who convert it incorrectly (to 12:20 am instead of 11:40 pm) get an answer that's 40 minutes off. The key technique is to break the journey at midnight and add the two segments.
Chapters
Question
Liu Wei got on a train at twenty to midnight.
He got off the train at 2:45 pm the next day.
How long was he on the train?
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