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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: Your uncle and aunt have come to visit for the day! They arrive at 9 o'clock. They went back at 7:30. How long did they stay?eleven hoursten hourseleven and a half hoursten and a half hours Q 2: 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?8:45 am8:30 am8:35 am8:40 am Q 3: 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 4: 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?5:456:005:155:00 Q 5: 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 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'cl9:30 am8:45 am7:30 am11:00 am Question 7: This question is available to subscribers only! Question 8: This question is available to subscribers only!