a) 9:13 − 7:42 =
[R]

b) 11:04 − 7:17 =
[R]

c) 8:30 − 7:22 =
[R]

d) 10:22 − 6:37 =
[R]

e) 6:00 − 4:55 =
[R]

f) 6:00 − 2:23 =
[R]

g) 11:49 − 8:04 =
[R]

h) 12:05 − 9:36 =
[R]

i) 9:18 − 8:04 =
[R]

j) 10:24 − 9:21 =
[R]