Elapsed Time — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A Grade 4 birthday party starts at 4:00 PM with activities totaling 2 h 45 min. The end time is 6 :45 PM.
4:00 plus 2 hours equals 6:00 PM, and 6:00 plus 45 minutes equals 6:45 PM.
2. A family BBQ schedule begins at 12:30 PM. Cooking takes 1 h, eating 45 min, games 1 h 15 min. The total duration is 3 hours.
1 hour plus 45 plus 1 hour 15 equals 3 hours total.
3. A Grade 4 movie night starts at 7:15 PM with a 1 h 50 min film. The end time is 9 :05 PM.
7:15 plus 1 hour is 8:15; 8:15 plus 50 minutes equals 9:05 PM.
4. A picnic itinerary plans 30 min setup, 1 h 30 min lunch, and 45 min cleanup. Total duration is 2 hours and 45 minutes.
30 plus 30 plus 45 equals 105 minutes (1 h 45), plus the 1-hour lunch chunk equals 2 h 45 min.
5. A Grade 4 family reunion begins at 11:00 AM and lasts 4 h 30 min. The end time is 3 :30 PM.
11:00 AM plus 4 hours is 3:00 PM; 3:00 plus 30 minutes equals 3:30 PM.
6. A pool party schedule starts at 2:45 PM and ends at 5:30 PM. Its duration is 2 hours and 45 minutes.
2:45 PM to 4:45 PM is 2 hours, and 4:45 to 5:30 is another 45 minutes.
7. A graduation event itinerary runs from 6:20 PM to 9:05 PM. Its duration is 2 hours and 45 minutes.
6:20 PM to 9:20 PM equals 3 hours; subtracting 15 minutes lands at 9:05, giving 2 h 45 min.
8. A wedding event schedule shows ceremony 45 min, photos 30 min, dinner 1 h 15 min, dancing 2 h. Total duration is 4 hours and 30 minutes.
45 plus 30 plus 15 equals 90 minutes (1 h 30); plus 1 hour and 2 hours equals 4 h 30 min.
9. A Grade 4 holiday dinner starts at 5:30 PM and lasts 3 h 45 min. The end time is 9:15 PM.
5:30 plus 3 hours is 8:30; 8:30 plus 45 minutes equals 9:15 PM.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Party 4:00 PM + 2 h 45 min duration end time
→ 6:45 PM
9:15 PM
Reunion 11:00 AM + 4 h 30 min duration end time
→ 3:30 PM
6:45 PM
BBQ 12:30 PM + 3 h schedule end time
→ 3:30 PM end
3:30 PM
Dinner 5:30 PM + 3 h 45 min duration end time
→ 9:15 PM
3:30 PM end
Add the duration to the start time; carry minutes into hours when totals exceed 60.