Determining Time Using Rounding Worksheet Template With Answer Key
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1
2Name:
Determining Time Using Rounding
Determine the answer by using rounding strategies.
A n s w e r s
6:25 + 2 hours = 8:25
When adding or subtracting time, it is often
4:25
Ex.
easier to round to the next hour first. In the
When rounded to 2 hours, we can
example below we can round 1 hour and 55
easily see that 6:25 + 2 hours is 8:25.
8:35
minutes up to 2 hours (5 minutes more).
But since we added 5 minutes, now
1.
we must take away 5 minutes.
3:20
6:25 + 1 hours and 55 minutes
2.
8:25 - 5 Minutes = 8:20
And now we know the elapsed time!
6:05
3.
5:50
Ex) 1:35 + 2 hours and 50 minutes =
4:25
4.
1) 4:40 + 3 hours and 55 minutes =
8:35
3:50
5.
2) 1:25 + 1 hour and 55 minutes =
3:20
8:00
6.
3) 4:15 + 1 hour and 50 minutes =
6:05
7:40
7.
4) 3:00 + 2 hours and 50 minutes =
5:50
4:35
5) 1:00 + 2 hours and 50 minutes =
3:50
8.
6) 6:10 + 1 hour and 50 minutes =
8:00
8:10
9.
7) 4:45 + 2 hours and 55 minutes =
7:40
6:05
10.
8) 2:40 + 1 hour and 55 minutes =
4:35
5:10
11.
9) 6:15 + 1 hour and 55 minutes =
8:10
7:40
10) 3:15 + 2 hours and 50 minutes =
6:05
12.
11) 9:05 - 3 hours and 55 minutes =
5:10
6:15
13.
12) 9:30 - 1 hour and 50 minutes =
7:40
5:40
14.
13) 9:05 - 2 hours and 50 minutes =
6:15
1:20
15.
14) 8:35 - 2 hours and 55 minutes =
5:40
2:05
15) 3:15 - 1 hour and 55 minutes =
1:20
16.
16) 5:00 - 2 hours and 55 minutes =
2:05
1:10
17.
17) 3:05 - 1 hour and 55 minutes =
1:10
4:30
18.
18) 8:20 - 3 hours and 50 minutes =
4:30
5:25
19.
19) 7:15 - 1 hour and 50 minutes =
5:25
3:45
20) 6:35 - 2 hours and 50 minutes =
3:45
20.
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