Determining Time Using Rounding Worksheet Template With Answer Key

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Name:
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
7:20
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.
7:25
minutes up to 2 hours (5 minutes more).
But since we added 5 minutes, now
1.
we must take away 5 minutes.
7:45
6:25 + 1 hours and 55 minutes
2.
8:25 - 5 Minutes = 8:20
And now we know the elapsed time!
8:30
3.
9:40
Ex) 3:30 + 3 hours and 50 minutes =
7:20
4.
1) 5:35 + 1 hour and 50 minutes =
7:25
7:30
5.
2) 4:50 + 2 hours and 55 minutes =
7:45
4:55
6.
3) 4:40 + 3 hours and 50 minutes =
8:30
6:20
7.
4) 7:45 + 1 hour and 55 minutes =
9:40
7:25
5) 4:40 + 2 hours and 50 minutes =
7:30
8.
6) 2:05 + 2 hours and 50 minutes =
4:55
5:25
9.
7) 2:25 + 3 hours and 55 minutes =
6:20
9:35
10.
8) 3:30 + 3 hours and 55 minutes =
7:25
7:05
11.
9) 3:35 + 1 hour and 50 minutes =
5:25
3:30
10) 6:40 + 2 hours and 55 minutes =
9:35
12.
11) 9:55 - 2 hours and 50 minutes =
7:05
5:25
13.
12) 5:20 - 1 hour and 50 minutes =
3:30
7:35
14.
13) 9:15 - 3 hours and 50 minutes =
5:25
1:30
15.
14) 10:25 - 2 hours and 50 minutes =
7:35
1:50
15) 4:25 - 2 hours and 55 minutes =
1:30
16.
16) 5:40 - 3 hours and 50 minutes =
1:50
7:05
17.
17) 10:00 - 2 hours and 55 minutes =
7:05
6:50
18.
18) 9:45 - 2 hours and 55 minutes =
6:50
2:45
19.
19) 4:35 - 1 hour and 50 minutes =
2:45
5:30
20) 7:20 - 1 hour and 50 minutes =
5:30
20.
1-10 95 90 85 80 75 70 65 60 55 50
Math
8
11-20 45 40 35 30 25 20 15 10 5
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