a) 10:06 − 8:27 =
[R]

b) 5:41 − 3:04 =
[R]

c) 12:32 − 9:04 =
[R]

d) 8:22 − 7:22 =
[R]

e) 6:19 − 2:37 =
[R]

f) 4:32 − 2:20 =
[R]

g) 12:13 − 9:02 =
[R]

h) 9:53 − 8:02 =
[R]

i) 7:49 − 5:07 =
[R]

j) 10:16 − 8:14 =
[R]