a) 8:46 − 5:06 =
[R]

b) 7:20 − 6:18 =
[R]

c) 3:05 − 1:17 =
[R]

d) 8:01 − 5:53 =
[R]

e) 5:25 − 2:14 =
[R]

f) 8:06 − 5:13 =
[R]

g) 11:05 − 8:42 =
[R]

h) 6:02 − 3:07 =
[R]

i) 8:11 − 5:36 =
[R]

j) 12:09 − 9:01 =
[R]