a) 10:30 − 8:10 =
[R]

b) 8:34 − 6:10 =
[R]

c) 6:08 − 3:18 =
[R]

d) 3:01 − 1:41 =
[R]

e) 3:24 − 2:11 =
[R]

f) 9:08 − 6:19 =
[R]

g) 8:16 − 6:42 =
[R]

h) 9:44 − 8:15 =
[R]

i) 9:05 − 7:29 =
[R]

j) 10:49 − 7:03 =
[R]