Elapsed time: word problems

Learning Objectives Define elapsed time and identify its components (start time, end time, duration). Calculate elapsed time within an hour and across multiple hours. Determine an end time given a start time and a duration. Determine a start time given an end time and a duration. Use strategies like number lines or T-charts to solve elapsed time word problems. Solve multi-step word problems involving elapsed time, including simple conversions between hours and minutes. Ever wondered how long your favorite movie lasts 🎬, or how much time you spend playing outside? 🤔 Knowing how to calculate time is super useful! In this lesson, you'll become a time detective! You'll learn how to figure out how much time passes between two events, which is called elapsed time. Thi...

TermDefinitionExample Elapsed TimeThe amount of time that has passed from a start time to an end time.If a game starts at 3:00 PM and ends at 4:30 PM, the elapsed time is 1 hour and 30 minutes. Start TimeThe exact moment when an event or activity begins.The school day's start time is 8:30 AM. End TimeThe exact moment when an event or activity finishes.The school day's end time is 3:15 PM. DurationAnother word for elapsed time; it means the length of time something lasts.The duration of the field trip was 4 hours. HourA unit of time equal to 60 minutes.There are 24 hours in one day. MinuteA unit of time, with 60 minutes making up one hour.It takes about 5 minutes to brush your teeth. Number Line (for time)A visual tool used to represent time intervals and calculate elapsed time b...

Calculating Elapsed Time $ ext{Elapsed Time} = ext{End Time} - ext{Start Time}$ To find out how long an event lasted, subtract the start time from the end time. Remember to handle minutes and hours separately and convert minutes if they go over 60. Finding End Time $ ext{End Time} = ext{Start Time} + ext{Elapsed Time}$ If you know when something starts and how long it lasts, add the duration to the start time to find when it will finish. Finding Start Time $ ext{Start Time} = ext{End Time} - ext{Elapsed Time}$ If you know when something ends and how long it lasted, subtract the duration from the end time to find when it began. Time Conversion (Minutes to Hours) $1 ext{ hour} = 60 ext{ minutes}$ When adding or subtracting time, if your minutes total 60...