a) 10:02 − 9:01 =
[R]

b) 2:27 − 1:19 =
[R]

c) 2:36 − 1:15 =
[R]

d) 7:38 − 4:01 =
[R]

e) 11:38 − 9:04 =
[R]

f) 11:35 − 8:12 =
[R]

g) 11:07 − 9:03 =
[R]

h) 11:19 − 8:16 =
[R]

i) 9:24 − 5:34 =
[R]

j) 8:34 − 6:25 =
[R]