a) 8:22 − 7:21 =
[R]

b) 9:02 − 6:50 =
[R]

c) 11:02 − 8:06 =
[R]

d) 8:28 − 6:29 =
[R]

e) 12:16 − 10:41 =
[R]

f) 9:03 − 5:18 =
[R]

g) 10:06 − 6:42 =
[R]

h) 5:02 − 3:10 =
[R]

i) 6:15 − 4:26 =
[R]

j) 9:29 − 8:26 =
[R]