Transcript Start Time

EnVision Math
Topic 7:
Lesson 7-4
Time:
Elapsed Time Finding Start Times
2010-11
How can I use
elapsed time
to find start
times?
To find the start time:
1. Count backward the
correct number of
hours.
2. Count backward the
correct number of
minutes.
Start Time = 6:16
?
p.m.
Elapsed Time = 3 hours
8:16 p.m.
7:16 p.m.
6:16 p.m.
End Time = 9:16 p.m.
Start Time = 2:24
?
a.m.
Elapsed Time = 5 hours
6:24 a.m.
5:24 a.m.
4:24 a.m.
3:24 a.m.
2:24 a.m.
End Time = 7:24 a.m.
Start Time = 10:45
?
a.m.
Elapsed Time = 4 hours
1:45 p.m.
12:45 p.m.
11:45 a.m.
10:45 a.m.
End Time = 2:45 p.m.
Start Time = 4:35
?
p.m.
Elapsed Time = 3 hours, 15 minutes
6:50 p.m.
4:50
5:50 p.m.
4:50 p.m.
End Time = 7:50 p.m.
Start Time = 9:15
?
a.m.
Elapsed Time = 2 hours, 20 minutes
10:35 a.m.
9:35 a.m.
9:35
End Time = 11:35 a.m.
Start Time = 2:40
?
p.m.
Elapsed Time = 3 hours, 20 minutes
5:00 p.m.
3:00
4:00 p.m.
3:00 p.m.
End Time = 6:00 p.m.
Start Time = 5:45
?
a.m.
Elapsed Time = 2 hours, 45 minutes
7:30 a.m.
6:30 a.m.
End Time = 8:30 a.m.
6:30
Start Time = 3:13
?
p.m.
Elapsed Time = 3 hours, 47 minutes
6:00 p.m.
4:00
5:00 p.m.
4:00 p.m.
End Time = 7:00 p.m.
Start Time = 2:46
?
p.m.
Elapsed Time = 2 hours, 34 minutes
4:20 p.m.
3:20 p.m.
3:20
End Time = 5:20 p.m.
Start Time = 7:19
?
p.m.
Elapsed Time = 1 hour, 23 minutes
7:42 p.m.
7:42
End Time = 8:42 p.m.
Start Time = 10:26
?
a.m.
Elapsed Time = 1 hour, 23 minutes
10:49 a.m.
10:49
End Time = 11:49 a.m.
Start Time = 12:37
?
p.m.
Elapsed Time = 2 hours, 36 minutes
2:13 p.m.
1:13 p.m.
End Time = 3:13 p.m.
1:13
Let’s
practice!