a) 12:17 − 8:40 =
[R]

b) 5:34 − 2:23 =
[R]

c) 10:03 − 6:26 =
[R]

d) 6:01 − 3:50 =
[R]

e) 10:21 − 8:00 =
[R]

f) 4:04 − 2:21 =
[R]

g) 6:56 − 3:02 =
[R]

h) 8:15 − 7:01 =
[R]

i) 6:01 − 2:26 =
[R]

j) 9:21 − 8:03 =
[R]