a) 5:36 − 2:01 =
[R]

b) 11:19 − 8:14 =
[R]

c) 7:15 − 3:26 =
[R]

d) 8:04 − 6:18 =
[R]

e) 2:45 − 1:02 =
[R]

f) 12:16 − 10:33 =
[R]

g) 5:32 − 4:15 =
[R]

h) 11:05 − 8:48 =
[R]

i) 11:02 − 7:37 =
[R]

j) 9:13 − 6:08 =
[R]