a) 11:19 − 8:33 =
[R]

b) 10:00 − 7:21 =
[R]

c) 5:21 − 2:28 =
[R]

d) 11:18 − 9:25 =
[R]

e) 8:22 − 5:04 =
[R]

f) 10:26 − 7:33 =
[R]

g) 12:10 − 10:19 =
[R]

h) 6:12 − 3:00 =
[R]

i) 10:02 − 7:55 =
[R]

j) 11:08 − 8:41 =
[R]