Understanding the N Method for Time Calculation

Mrs. Campbell introduces the N method for calculating elapsed time, a new technique she learned. She provides two examples: one calculating elapsed time from a start and end time, and another determining an end time given a start time and duration. The method involves creating a visual 'N' diagram to map out time increments. She concludes with tips for using the method effectively.

What is the main advantage of the N method for calculating elapsed time?

• It is a traditional method used for decades.

• It is complex and requires advanced math skills.

• It is simple and easy for kids to understand.

• It requires no calculations.

In the first example, what is the initial step in using the N method?

• Add the minutes directly.

• Subtract the start time from the end time.

• Draw a capital N and mark the known times.

• Calculate the total hours first.

How many minutes are there from 8:32 to 9:00 in the first example?

• 28 minutes

• 30 minutes

• 32 minutes

• 25 minutes

In the first example, how many hours are there from 9:00 to 1:00?

• 3 hours

• 4 hours

• 2 hours

• 5 hours

What is the total elapsed time calculated in the first example?

• 4 hours and 38 minutes

• 5 hours and 10 minutes

• 3 hours and 38 minutes

• 4 hours and 28 minutes

In the second example, what is the first step after noting the start time?

• Calculate the end time directly.

• Add the hours first.

• Subtract the minutes.

• Add the minutes to the start time.

What is the end time calculated in the second example?

• 1:45

• 2:30

• 2:05

• 3:00

What should you do if the total minutes exceed 60 in the N method?

• Ignore the extra minutes.

• Convert the extra minutes into hours.

• Subtract the extra minutes.

• Add more minutes.

What is a key tip for using the N method effectively?

• Ignore the minutes.

• Circle the numbers to add them later.

• Use a calculator for accuracy.

• Always subtract the hours first.

What should students remember to do after using the N method?

• Check their work with a calculator.

• Add all the circled numbers for the final time.

• Write down the start and end times.

• Subtract the start time from the end time.