a) 5:38 − 3:19 =
[R]

b) 5:16 − 2:14 =
[R]

c) 10:03 − 7:56 =
[R]

d) 11:42 − 9:10 =
[R]

e) 7:29 − 6:06 =
[R]

f) 10:51 − 9:02 =
[R]

g) 8:29 − 7:08 =
[R]

h) 8:11 − 4:26 =
[R]

i) 8:17 − 4:27 =
[R]

j) 4:09 − 1:36 =
[R]