Elapsed Time Problems on a Number Line

Miss Aquila teaches how to solve elapsed time word problems using a number line. She explains common mistakes, such as adding start and end times or subtracting elapsed time from the end time. The lesson includes examples like a bus ride, dolphin show, and stingray activity, demonstrating how to use one-minute intervals and skip counting to find elapsed time.

What is a common mistake when calculating elapsed time?

• Using a stopwatch

• Multiplying the times

• Subtracting the end time from the start time

• Adding start and end times

Tags

CCSS.3.MD.A.1

Why doesn't traditional subtraction work well for time calculations?

• Because of daylight savings

• Due to time zones

• Specific units of measurement in time

• It actually works well

Tags

CCSS.3.MD.A.1

What strategy is recommended for solving elapsed time problems?

• Using a digital clock

• A number line

• Guessing and checking

• Asking a friend

Tags

CCSS.3.MD.A.1

How long was the bus ride to the City Aquarium?

• 15 minutes

• 10 minutes

• 7 minutes

• 8 minutes

What is a 'friendly time' as mentioned in the video?

• A time that is easy to remember

• A time that is exactly on the hour

• A time that is easy to count from

• A time when friends meet

Tags

CCSS.3.MD.A.1

How long was the dolphin show?

• 20 minutes

• 17 minutes

• 15 minutes

• 12 minutes

Why is skip counting useful in calculating elapsed time?

• It's more accurate

• It requires a calculator

• It's faster than counting by ones

• It's the only way to calculate time

Tags

CCSS.3.MD.A.1

How much time did the class spend petting stingrays?

• 15 minutes

• 12 minutes

• 14 minutes

• 10 minutes

Tags

CCSS.3.MD.A.1

What is the purpose of using one minute intervals in time calculation?

• To increase calculation time

• To make the calculation easier

• To confuse the students

• To teach about fractions

Tags

CCSS.1.MD.B.3

What does the video primarily teach?

• Mathematical operations with time

• The history of timekeeping

• Solving elapsed time problems with a number line

• How to use a stopwatch

Tags

CCSS.3.MD.A.1