Elapsed time

Learning Objectives Identify the start time and end time on a clock. Calculate elapsed time in whole hours. By the end of of this lesson, students will be able to calculate elapsed time in half-hour intervals. Use a number line to find how much time has passed. Solve simple word problems about elapsed time. Find the end time when given a start time and elapsed time. You started playing with your toys at 2:00. 🧸 You stopped at 3:00. How long did you play? We will learn about the time that passes between two moments. This is called elapsed time. It helps us know how long things take! Real-World Applications Knowing how long you play at the park. 🌳 Figuring out when a movie will end. 🎬 Timing how long it takes to bake cookies. 🍪 Seeing how long your nap was. 😴

TermDefinitionExample Start TimeThe time when an activity begins. 🚀Your soccer game starts at 9:00 A.M. End TimeThe time when an activity is over. 🏁Your soccer game ends at 10:00 A.M. Elapsed TimeThe amount of time that passes from start to end.From 9:00 to 10:00 is one hour of elapsed time. Analog ClockA clock with a round face and moving hands. 🕰️The short hand points to the hour. The long hand points to the minutes. HourA unit of time made of 60 minutes.We have art class for one hour. Half-HourA unit of time made of 30 minutes.Lunchtime is a half-hour long.

Finding Elapsed Time End Time - Start Time = Elapsed Time To find how much time passed, find the difference between the end and start times. Finding the End Time Start Time + Elapsed Time = End Time To find when something will finish, add the elapsed time to the start time. The Clock Jump Method Count the hour jumps first, then the minute jumps. Use a clock. Count the big jumps for hours. Then count the small jumps for minutes.