a) 11:29 − 9:16 =
[R]

b) 11:06 − 7:35 =
[R]

c) 12:23 − 8:36 =
[R]

d) 5:01 − 3:34 =
[R]

e) 7:02 − 4:06 =
[R]

f) 6:17 − 3:40 =
[R]

g) 9:19 − 6:01 =
[R]

h) 3:15 − 1:30 =
[R]

i) 9:24 − 8:09 =
[R]

j) 10:12 − 6:31 =
[R]