a) 11:27 − 9:10 =
[R]

b) 11:58 − 9:01 =
[R]

c) 6:27 − 4:29 =
[R]

d) 9:04 − 6:39 =
[R]

e) 12:14 − 10:34 =
[R]

f) 4:29 − 1:27 =
[R]

g) 11:25 − 9:25 =
[R]

h) 4:06 − 1:35 =
[R]

i) 8:00 − 4:18 =
[R]

j) 11:08 − 8:18 =
[R]