a) 11:35 − 10:23 =
[R]

b) 8:03 − 5:26 =
[R]

c) 8:33 − 6:00 =
[R]

d) 11:06 − 8:28 =
[R]

e) 7:39 − 5:11 =
[R]

f) 10:54 − 7:04 =
[R]

g) 5:15 − 3:11 =
[R]

h) 12:20 − 10:03 =
[R]

i) 10:04 − 6:30 =
[R]

j) 8:21 − 6:19 =
[R]