Solving Elapsed Time Word Problems Using a Number Line

This video tutorial teaches how to solve elapsed time word problems using a number line. It covers strategies for calculating elapsed time in one-minute intervals and provides examples, such as cooking lasagna and determining the duration of a birthday party. The tutorial emphasizes avoiding common mistakes and using a number line for accurate calculations.

What is a common mistake when solving elapsed time word problems?

• Using a number line to count by fives

• Using a clock to visualize the time

• Adding the change of time directly to the start time

• Counting by ones to reach a friendly number

When solving elapsed time problems, why is it helpful to reach a 'friendly number'?

• It helps in visualizing the end time

• It makes it easier to count by fives

• It allows you to skip counting altogether

• It reduces the total elapsed time

If a lasagna takes 52 minutes to cook starting at 6:31 PM, what time will it be ready?

• 7:15 PM

• 7:23 PM

• 7:30 PM

• 7:45 PM

How long did the birthday party last if it started at 5:15 PM and ended at 6:52 PM?

• 2 hours

• 1 hour and 45 minutes

• 1 hour and 37 minutes

• 1 hour and 30 minutes

What is the first step in solving an elapsed time problem using a number line?

• Identify the end time

• Identify the start time and change of time

• Count by tens to reach the end time

• Estimate the total time