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