This video tutorial teaches how to solve elapsed time word problems using a number line. It covers identifying the start time, end time, and change of time. The tutorial includes examples like a baby's nap and a bus driver's schedule to illustrate the concept. It emphasizes the importance of understanding time intervals and using a number line to find unknown times.

What are the three main components of an elapsed time word problem?

• Start time, speed, and change of time

• Start time, end time, and change of time

• Start time, duration, and distance

• End time, speed, and distance

When using a number line to solve 19 minus 10, where do you start?

• At 0

• At 9

• At 19

• At 10

What is the correct time after 12 PM?

• 12:30 PM

• 1 PM

• 2 PM

• 13 PM

If a baby falls asleep at 1:10 PM and naps for 2 hours, what time will the baby wake up?

• 1:10 PM

• 4:10 PM

• 3:10 PM

• 2:10 PM

A bus driver arrives at a house at 8:30 AM after driving for 2 hours. What time did he start driving?

• 6:30 AM

• 8:00 AM

• 7:30 AM

• 9:30 AM