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### Grade 3 - Mathematics7.5 Elapsed Time

 Method: 4:30 is also read as half past 4. (because 30 minutes makes half an hour) 4:15 is also read as quarter past 4. (because 15 minutes makes quarter hour) The elapsed time is the difference between two intervals of time. Example: The show started at 2.20 pm and ended at 3.45 pm. How long did the show go on? Start time = 2:20 End time = 3:45 Time elapsed = 3:45 - 2:20 (2:20 to 3:20 is 1 hour, 3:20 to 3:45 is 25 minutes) 1 hour 25 minutes Answer: 1:25 Directions: Answer the following. Also write at least 10 examples of your own.
 Q 1: Mr. Jones walks to work every morning. It takes him twenty minutes to get to work. He must be to work by 9. When should he start?8:30 am8:45 am8:35 am8:40 am Q 2: Measha woke up at 7 in the morning. After 6 hours she has a dentist appointment. What time does she need to see the dentist?12:0011:001:002:00 Q 3: Mark started on his Math homework at 4 and finished at 4:20. How long did he take to finish his homework?four minutesthirty minutestwenty minutesfour hours Q 4: Jacob finished his homework after working on it for thirty-five minutes. He started at 4:15. What time did he complete his homework?4:454:554:505:10 Q 5: The airport requests that all passengers report to the airport forty-five minutes before their flight. If Jennifer is taking a 6 o'clock flight. When should she arrive at the airport?5:005:456:005:15 Q 6: If you travel from Raleigh to the coast, it takes over two and a half hours by car. If you and your family are planning a trip to the coast, what is a reasonable time to leave your house in the morning, if you want to be on the beach by lunch time(12 0'cl8:45 am9:30 am7:30 am11:00 am Q 7: The coach asked the player to practice for forty-five minutes each morning. Their practice starts at 7. When did they finish practice?7:50 am7:45 pm7:50 pm7:45 am Q 8: The concert started at 8 and finished at 10:30. How long did the concert last?2hrs. and 30 minutes3 hours2 hours3 hr. and 30 minutes Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!

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