a) 5:07 − 3:14 =
[R]

b) 9:16 − 7:11 =
[R]

c) 11:06 − 8:29 =
[R]

d) 12:11 − 8:44 =
[R]

e) 7:05 − 4:32 =
[R]

f) 2:10 − 1:02 =
[R]

g) 12:00 − 9:53 =
[R]

h) 12:41 − 9:07 =
[R]

i) 11:31 − 10:16 =
[R]

j) 6:08 − 4:36 =
[R]