We’ve recently been learning different ways to solve elapsed time problems. One way that students found helpful was using a line so that it was easier to visualize the problem. Marshall and Amanda created a video to help show one way to solve an elapsed time problem. Enjoy!
If you enjoyed this video, you may want to check out a video created by Mr. Salsich’s class in Connecticut about number-line subtraction. Their video helped to inspire ours. Thanks Mr. Salsich’s class!
We found that using a number-line to solve elapsed time really helped a lot! We begin by drawing out a number-line. We place the beginning time on the left side and the ending time on the right. Then, starting on the left hand side, we find out what the next whole hour would be. We put how long it would take us to get from the beginning time to the next hour on our number-line. Then we jump to the ending time and we go backwards to the previous hour. In between that we put how much time is between those. Then, finally, we right down how much time is in between those two hours in the middle. We add up all of our time and we have the amount of time that has elapsed from the beginning until the end!
We have a few examples of our work done out down below.
If you’d like your students to try out solving elapsed time with a number-line, feel free to use the worksheet below.