a) 10:06 − 8:08 =
[R]

b) 11:50 − 8:02 =
[R]

c) 8:44 − 5:07 =
[R]

d) 11:30 − 10:21 =
[R]

e) 5:07 − 2:07 =
[R]

f) 12:02 − 10:09 =
[R]

g) 10:34 − 8:17 =
[R]

h) 12:18 − 8:24 =
[R]

i) 9:14 − 7:28 =
[R]

j) 12:11 − 10:17 =
[R]