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
6:00
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.
6:45
minutes up to 2 hours (5 minutes more).
But since we added 5 minutes, now
1.
we must take away 5 minutes.
7:05
6:25 + 1 hours and 55 minutes
2.
8:25 - 5 Minutes = 8:20
And now we know the elapsed time!
5:55
3.
8:30
Ex) 4:10 + 1 hour and 50 minutes =
6:00
4.
1) 2:50 + 3 hours and 55 minutes =
6:45
8:35
5.
2) 3:15 + 3 hours and 50 minutes =
7:05
11:40
6.
3) 3:05 + 2 hours and 50 minutes =
5:55
11:45
7.
4) 5:35 + 2 hours and 55 minutes =
8:30
3:50
5) 5:45 + 2 hours and 50 minutes =
8:35
8.
6) 7:50 + 3 hours and 50 minutes =
11:40
8:55
9.
7) 7:50 + 3 hours and 55 minutes =
11:45
10:20
10.
8) 1:00 + 2 hours and 50 minutes =
3:50
2:00
11.
9) 6:00 + 2 hours and 55 minutes =
8:55
5:05
10) 6:25 + 3 hours and 55 minutes =
10:20
12.
11) 3:50 - 1 hour and 50 minutes =
2:00
5:35
13.
12) 8:55 - 3 hours and 50 minutes =
5:05
6:45
14.
13) 7:30 - 1 hour and 55 minutes =
5:35
1:30
15.
14) 9:40 - 2 hours and 55 minutes =
6:45
4:10
15) 4:25 - 2 hours and 55 minutes =
1:30
16.
16) 8:05 - 3 hours and 55 minutes =
4:10
2:30
17.
17) 4:25 - 1 hour and 55 minutes =
2:30
7:00
18.
18) 9:50 - 2 hours and 50 minutes =
7:00
6:20
19.
19) 10:10 - 3 hours and 50 minutes =
6:20
5:00
20) 8:55 - 3 hours and 55 minutes =
5:00
20.
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Math
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11-20 45 40 35 30 25 20 15 10 5
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