a) 9:15 − 6:33 =
[R]

b) 9:04 − 5:39 =
[R]

c) 12:25 − 10:28 =
[R]

d) 9:03 − 5:21 =
[R]

e) 6:30 − 3:15 =
[R]

f) 12:19 − 10:07 =
[R]

g) 8:25 − 5:03 =
[R]

h) 5:38 − 3:16 =
[R]

i) 3:46 − 2:10 =
[R]

j) 9:16 − 6:14 =
[R]