a) 11:23 − 10:15 =
[R]

b) 7:12 − 3:33 =
[R]

c) 11:25 − 10:17 =
[R]

d) 3:27 − 2:06 =
[R]

e) 7:30 − 5:26 =
[R]

f) 10:12 − 8:01 =
[R]

g) 5:44 − 3:12 =
[R]

h) 11:01 − 7:38 =
[R]

i) 12:06 − 10:06 =
[R]

j) 11:11 − 7:29 =
[R]