a) 7:14 − 3:44 =
[R]

b) 10:33 − 7:24 =
[R]

c) 9:06 − 6:09 =
[R]

d) 9:03 − 5:32 =
[R]

e) 9:52 − 7:03 =
[R]

f) 8:03 − 6:48 =
[R]

g) 7:05 − 6:00 =
[R]

h) 12:16 − 9:29 =
[R]

i) 9:33 − 6:15 =
[R]

j) 12:23 − 10:05 =
[R]