a) 9:00 − 6:04 =
[R]

b) 7:19 − 3:34 =
[R]

c) 5:14 − 2:17 =
[R]

d) 11:06 − 8:38 =
[R]

e) 12:30 − 9:27 =
[R]

f) 6:05 − 3:54 =
[R]

g) 7:10 − 4:40 =
[R]

h) 9:44 − 7:04 =
[R]

i) 9:49 − 6:04 =
[R]

j) 10:17 − 9:15 =
[R]