a) 7:29 − 6:29 =
[R]

b) 7:16 − 4:13 =
[R]

c) 11:10 − 8:02 =
[R]

d) 8:30 − 5:27 =
[R]

e) 6:12 − 4:04 =
[R]

f) 9:10 − 6:30 =
[R]

g) 9:27 − 7:11 =
[R]

h) 8:49 − 5:01 =
[R]

i) 12:00 − 9:01 =
[R]

j) 12:29 − 9:26 =
[R]