8
Practice
• • • • • • • • • Adding and Subtracting Time
Directions: Using the information on page 33, compute the elapsed time for the problems below.
Remember to regroup when needed.
1.
11:35
.
.
2.
11:10
.
.
3.
10:25
.
.
4.
9:25
.
.
A
M
A
M
P
M
P
M
– 8:00
.
.
– 9:30
.
.
– 4:00
.
.
– 2:30
.
.
A
M
A
M
P
M
P
M
5.
9:55
.
.
6.
11:02
.
.
7.
9:05
.
.
8.
6:15
.
.
A
M
A
M
P
M
P
M
– 7:20
.
.
– 2:56
.
.
– 1:09
.
.
– 3:59
.
.
A
M
A
M
P
M
P
M
9.
134 days 4 hrs 23 min
10.
67 days 19 hrs 15 min
+ 56 days 9 hrs 9 min
+ 23 days 8 hrs 24 min
11.
12 wks 20 days 14 hrs 41 min
12.
39 wks 15 days 13 hrs 59 min
+ 19 wks 3 days 23 hrs 59 min
– 25 wks 2 days 8 hrs 53 min
13.
40 days 3 hrs 50 min
14.
75 days 23 hrs 15 min
– 13 days 15 hrs 16 min
– 62 days 3 hrs 50 min
4 3