a) 9:03 − 5:37 =
[R]

b) 12:35 − 9:19 =
[R]

c) 7:23 − 6:01 =
[R]

d) 11:40 − 9:11 =
[R]

e) 6:01 − 2:24 =
[R]

f) 10:09 − 9:01 =
[R]

g) 10:05 − 7:03 =
[R]

h) 7:26 − 3:31 =
[R]

i) 6:29 − 4:15 =
[R]

j) 6:52 − 5:02 =
[R]