a) 11:25 − 10:21 =
[R]

b) 12:34 − 10:01 =
[R]

c) 4:25 − 1:07 =
[R]

d) 9:27 − 6:26 =
[R]

e) 12:08 − 11:06 =
[R]

f) 3:00 − 1:16 =
[R]

g) 11:35 − 10:15 =
[R]

h) 10:15 − 7:11 =
[R]

i) 4:13 − 2:32 =
[R]

j) 6:03 − 3:30 =
[R]