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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: The coach asked the player to practice for forty-five minutes each morning. Their practice starts at 7. When did they finish practice?
7:45 am
7:50 pm
7:45 pm
7:50 am

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

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

Q 4: The concert started at 8 and finished at 10:30. How long did the concert last?
3 hours
3 hr. and 30 minutes
2hrs. and 30 minutes
2 hours

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Question 6: This question is available to subscribers only!


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