Elapsed Time — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. A Grade 4 night shift starts at 10:45 PM and ends at 2:30 AM. What is the elapsed time?
A) 3 hours 45 minutes
B) 4 hours 15 minutes
C) 3 hours 15 minutes
D) 4 hours 45 minutes
Grade 4 elapsed time crossing midnight splits the duration at 12:00 AM and adds both parts.
2. A Grade 4 baker works 1 h 35 min, takes a 25 min break, then works 1 h 50 min. Total time?
A) 3 hours 50 minutes
B) 3 hours 10 minutes
C) 4 hours 10 minutes
D) 2 hours 50 minutes
Grade 4 multi-step elapsed time totals minutes from each segment, then converts to hours and minutes.
3. A Grade 4 flight leaves at 9:50 PM and lands at 1:15 AM the next day. How long is the flight?
A) 3 hours 25 minutes
B) 4 hours 25 minutes
C) 2 hours 35 minutes
D) 3 hours 35 minutes
Grade 4 students cross midnight by computing time to 12:00 AM and adding the time after midnight.
4. A Grade 4 day camp runs 8:30 AM to 3:45 PM. How long is the camp?
A) 7 hours 15 minutes
B) 6 hours 15 minutes
C) 7 hours 45 minutes
D) 8 hours 15 minutes
Grade 4 elapsed time across noon counts whole hours from start hour to end hour, then adds extra minutes.
Part B: Fill in the Blank
Write the correct answer on each line.
1. From 11:20 PM to 2:05 AM is a Grade 4 elapsed time of 2 hours 45 minutes (cross midnight).
Grade 4 elapsed time across midnight splits the duration at 12:00 AM and adds the two parts.
2. A Grade 4 trip with legs of 55 min, 1 h 10 min, and 35 min totals 160 minutes.
Grade 4 students convert mixed durations into minutes before adding to keep the math simple.
3. If 160 minutes is converted, it equals 2 hours 40 minutes for Grade 4 elapsed time.
Grade 4 conversions divide total minutes by 60; the remainder gives the leftover minutes.
4. Starting at 10:45 PM with 3 h 45 min of activities, a Grade 4 student ends at 2:30 AM.
Grade 4 elapsed time across midnight adds the duration to the start time and switches PM to AM at 12:00 AM.
5. From 8:30 AM to 3:45 PM is a Grade 4 elapsed time of 7 hours 15 minutes.
Grade 4 elapsed time across noon uses count-up strategies for whole hours and leftover minutes.