a) 4:48 − 3:04 =
[R]

b) 9:12 − 6:34 =
[R]

c) 5:10 − 1:23 =
[R]

d) 10:14 − 7:12 =
[R]

e) 9:11 − 7:29 =
[R]

f) 3:16 − 1:13 =
[R]

g) 10:05 − 6:42 =
[R]

h) 12:00 − 8:32 =
[R]

i) 11:15 − 9:31 =
[R]

j) 5:10 − 1:47 =
[R]