Elapsed Time — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. A Grade 4 student goes to sleep at 9:30 PM and wakes at 6:45 AM. What is the duration of sleep?
A) 8 hours 15 minutes
B) 9 hours 15 minutes
C) 9 hours 45 minutes
D) 10 hours 15 minutes
9:30 PM to 12:00 AM is 2 h 30 min; 12:00 to 6:45 AM is 6 h 45 min; total is 9 h 15 min.
2. An overnight itinerary departs at 11:15 PM Friday and arrives at 7:30 AM Saturday. What is the trip duration?
A) 7 hours 15 minutes
B) 8 hours
C) 8 hours 15 minutes
D) 9 hours 15 minutes
11:15 PM to 12:00 AM is 45 min; 12:00 to 7:30 AM is 7 h 30 min; total is 8 h 15 min.
3. A bakery's schedule runs from 10:45 PM Tuesday to 5:15 AM Wednesday. What is the duration of the shift?
A) 5 hours 30 minutes
B) 6 hours
C) 6 hours 30 minutes
D) 7 hours
10:45 PM to 12:00 AM is 1 h 15 min; 12:00 to 5:15 AM is 5 h 15 min; total is 6 h 30 min.
4. A Grade 4 camping itinerary starts at 8:20 PM and the next event begins at 5:50 AM. What is the duration between?
A) 8 hours 30 minutes
B) 9 hours
C) 9 hours 30 minutes
D) 10 hours
8:20 PM to 12:00 AM is 3 h 40 min; 12:00 to 5:50 AM is 5 h 50 min; total is 9 h 30 min.
Part B: Fill in the Blank
Write the correct answer on each line.
1. A Grade 4 student sleeps from 9:30 PM to 6:45 AM. The duration is 9 hours and 15 minutes.
9:30 PM to 12:00 AM is 2 h 30 min; 12:00 to 6:45 AM is 6 h 45 min; total is 9 h 15 min.
2. An overnight train itinerary departs 10:50 PM and arrives 7:20 AM. Its duration is 8 hours and 30 minutes.
10:50 PM to 12:00 AM is 1 h 10 min; 12:00 to 7:20 AM is 7 h 20 min; total is 8 h 30 min.
3. A Grade 4 sleep schedule of 9:45 PM to 6:30 AM has a duration of 8 hours and 45 minutes.
9:45 PM to 12:00 AM is 2 h 15 min; 12:00 to 6:30 AM is 6 h 30 min; total is 8 h 45 min.
4. A bus itinerary departs 11:40 PM and arrives 5:10 AM the next day. The duration is 5 hours and 30 minutes.
11:40 PM to 12:00 AM is 20 min; 12:00 to 5:10 AM is 5 h 10 min; total is 5 h 30 min.
5. A Grade 4 student naps from 11:20 PM to 12:55 AM. The duration is 1 hour and 35 minutes.
11:20 PM to 12:00 AM is 40 min; 12:00 to 12:55 AM is 55 min; total is 1 h 35 min.