Slides

Elapsed Time

Karen Grigg Math I Intervention 9th grade English 6 slides

Slides in this set (6)

ELAPSED TIME
- Henry leaves home at 8:26 am to head to school. He arrives back at home at 1:15 pm. How long was Henry away from home?
- Now, let's create a T-CHART breaking down the minutes and hours.
START TIME: 8:26 AM END TIME: 1:15 PM
- START TIME: 8:26 AM
- END TIME: 1:15 PM
- So when you are starting with a time like 8:26 find the next hour or half hour past that time. So the next half hour would be 8:30. Then calculate the number of minutes from your start time to the time you determined. So from 8:26 to 8:30 is 4 minutes.
START TIME: 8:26 AM END TIME: 1:15 PM
- Next count by hours to the next time that would come just before your ending time.. So we can count by hours up until 12:30 because 1:30 would be past our ending time. From 8:30 until 12:30 is 4 hours.
START TIME: 8:26 AM END TIME: 1:15 PM
- Next count by 30 minute intervals if you can. From 12:30 pm to 1:00 pm there is one 30 minute interval.
START TIME: 8:26 AM END TIME: 1:15 PM
- Now count the number of minutes it takes to reach your ending time. From 1:00 pm to 1:15 pm it is 15 minutes.
START TIME: 8:26 AM END TIME: 1:15 PM
- Now all we have to do is total the hours and minutes up in the right hand column to find the total time that elapsed.
- Notice how the hours and minutes line up at the end to make it easier to add up the final amount of time that had elapsed.