Calculating Time Differences

This video tutorial explores how to calculate the time difference between two given times. It begins with a simple example of watching a movie and uses a number line to visualize the calculation. The tutorial then introduces a subtraction method, including borrowing, to find the time difference. It also covers how to handle time differences that cross the AM/PM barrier by converting times to military time for easier calculations.

At what time did the movie start in the example?

• 1:25 PM

• 3:16 PM

• 2:00 PM

• 12:00 PM

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CCSS.3.MD.A.1

How many minutes are needed to reach the next whole hour from 1:25 PM?

• 30 minutes

• 45 minutes

• 25 minutes

• 35 minutes

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CCSS.4.MD.A.1

What is the total time duration of the movie from 1:25 PM to 3:16 PM?

• 1 hour 51 minutes

• 2 hours 16 minutes

• 1 hour 45 minutes

• 2 hours

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CCSS.3.MD.A.1

What does borrowing involve when subtracting times?

• Regrouping minutes into hours

• Adding minutes from hours

• Subtracting hours directly

• None of the above

Tags

CCSS.3.MD.A.1

How do you calculate time difference when crossing from AM to PM without converting to military time?

• Add 12 to PM times

• Convert AM to PM

• Subtract start time from end time

• Calculate to noon and then to PM time

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CCSS.3.MD.A.1

What is the total time from 9:16 AM to 10:17 PM using number line method?

• 12 hours 17 minutes

• 11 hours 1 minute

• 13 hours 1 minute

• 12 hours 61 minutes

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CCSS.3.MD.A.1

What is the result of adding 12 hours to a PM time for military time conversion?

• It subtracts 12 from the time

• It simplifies time calculation

• None of the above

• It converts time to AM

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CCSS.1.MD.B.3

How does military time help in calculating time differences?

• Eliminates need for AM/PM distinction

• Reduces calculation errors

• None of the above

• Both A and B

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CCSS.3.MD.A.1

What is the correct military time for 10:17 PM?

• 22:17

• 10:17

• 12:17

• 20:17

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CCSS.3.MD.A.1

How do you handle minutes when borrowing hours in time subtraction?

• Add 60 to minutes

• Add 6 to the tens place of minutes

• Subtract 10 from minutes

• None of the above

Tags

CCSS.3.MD.A.1