Calculating Elapsed Time with T-charts

Sara from Geeky Tici explains a strategy for calculating elapsed time using a T-chart. She presents a word problem where Christy arrives at school at 7:45 and leaves at 1:28. Sara demonstrates how to set up a T-chart, add hours and minutes, and calculate the total time Christy spent at school, which is 5 hours and 43 minutes.

What is the main strategy introduced in the video for calculating elapsed time?

• Using a calculator

• Using a calendar

• Using a T-chart

• Using a stopwatch

What time did Christy arrive at school?

• 7:45 AM

• 8:00 AM

• 9:00 AM

• 7:30 AM

What time was Christy signed out of school?

• 1:00 PM

• 1:15 PM

• 1:45 PM

• 1:28 PM

What is the first step in setting up the T-chart?

• Write the end time on the left

• Write the start time on the left

• Write the total time on the right

• Write the date on the top

How many hours can be added to 7:45 AM without exceeding the end time?

• 4 hours

• 5 hours

• 6 hours

• 3 hours

What is the next step after adding hours in the T-chart?

• Subtract minutes

• Add more hours

• Add minutes

• Start over

How many minutes are added from 12:45 to 1:00?

• 5 minutes

• 10 minutes

• 15 minutes

• 20 minutes

What is the total number of minutes added from 1:00 to 1:28?

• 20 minutes

• 28 minutes

• 15 minutes

• 18 minutes

What is the final step in calculating the total time Christy was at school?

• Subtract the start time from the end time

• Add up all the hours and minutes

• Multiply the hours by the minutes

• Divide the total minutes by 60

How many hours was Christy at school?

• 4 hours

• 5 hours

• 6 hours

• 3 hours