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Grade 3 - Mathematics
7.5 Elapsed Time

Method:

  1. 4:30 is also read as half past 4. (because 30 minutes makes half an hour)
  2. 4:15 is also read as quarter past 4. (because 15 minutes makes quarter hour)
  3. 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: Mark started on his Math homework at 4 and finished at 4:20. How long did he take to finish his homework?
four hours
twenty minutes
four minutes
thirty minutes

Q 2: Mr. Dan started cooking at 12. He finished cooking at 2:20. How long did he cook?
2:10
1:00
2:20
5:00

Q 3: The concert started at 8 and finished at 10:30. How long did the concert last?
3 hours
2hrs. and 30 minutes
3 hr. and 30 minutes
2 hours

Q 4: Mike played basketball for 3 and 1/2 hours. He started at 6. When did he finish?
9:30
8:30
7:00
10:00

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?
6:00
5:15
5:45
5:00

Q 6: Jacob finished his homework after working on it for thirty-five minutes. He started at 4:15. What time did he complete his homework?
4:50
4:55
5:10
4:45

Q 7: Mom must leave the conditioner on her hair for 10 minutes. She put the conditioner on at 1:30. At what time should she wash off.
1:40
2:00
2:30
1:45

Q 8: 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?
2:00
11:00
12:00
1:00

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Question 10: This question is available to subscribers only!


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