a) 9:20 − 7:00 =
[R]

b) 9:28 − 8:28 =
[R]

c) 11:20 − 8:17 =
[R]

d) 3:21 − 2:21 =
[R]

e) 8:01 − 6:47 =
[R]

f) 5:02 − 2:14 =
[R]

g) 9:42 − 8:13 =
[R]

h) 8:27 − 6:30 =
[R]

i) 9:05 − 5:47 =
[R]

j) 5:29 − 3:03 =
[R]