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
9:40
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.
5:10
minutes up to 2 hours (5 minutes more).
But since we added 5 minutes, now
1.
we must take away 5 minutes.
9:15
6:25 + 1 hours and 55 minutes
2.
8:25 - 5 Minutes = 8:20
And now we know the elapsed time!
8:05
3.
4:00
Ex) 7:50 + 1 hour and 50 minutes =
9:40
4.
1) 1:15 + 3 hours and 55 minutes =
5:10
6:40
5.
2) 7:25 + 1 hour and 50 minutes =
9:15
8:40
6.
3) 5:15 + 2 hours and 50 minutes =
8:05
4:45
7.
4) 2:10 + 1 hour and 50 minutes =
4:00
9:10
5) 4:50 + 1 hour and 50 minutes =
6:40
8.
6) 4:50 + 3 hours and 50 minutes =
8:40
9:50
9.
7) 2:50 + 1 hour and 55 minutes =
4:45
5:00
10.
8) 5:20 + 3 hours and 50 minutes =
9:10
5:50
11.
9) 6:00 + 3 hours and 50 minutes =
9:50
3:15
10) 3:10 + 1 hour and 50 minutes =
5:00
12.
11) 7:45 - 1 hour and 55 minutes =
5:50
5:20
13.
12) 6:05 - 2 hours and 50 minutes =
3:15
3:20
14.
13) 9:15 - 3 hours and 55 minutes =
5:20
5:10
15.
14) 6:10 - 2 hours and 50 minutes =
3:20
2:10
15) 9:05 - 3 hours and 55 minutes =
5:10
16.
16) 4:00 - 1 hour and 50 minutes =
2:10
3:05
17.
17) 6:00 - 2 hours and 55 minutes =
3:05
5:20
18.
18) 7:10 - 1 hour and 50 minutes =
5:20
3:45
19.
19) 5:40 - 1 hour and 55 minutes =
3:45
3:45
20) 7:40 - 3 hours and 55 minutes =
3:45
20.
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Math
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