a) 8:01 − 5:01 =
[R]

b) 9:05 − 6:38 =
[R]

c) 9:34 − 8:22 =
[R]

d) 9:49 − 8:00 =
[R]

e) 11:32 − 8:23 =
[R]

f) 12:14 − 9:28 =
[R]

g) 3:16 − 1:08 =
[R]

h) 7:14 − 4:03 =
[R]

i) 8:11 − 4:16 =
[R]

j) 6:20 − 3:00 =
[R]