a) 7:11 − 5:03 =
[R]

b) 10:27 − 9:01 =
[R]

c) 5:16 − 2:19 =
[R]

d) 6:33 − 3:08 =
[R]

e) 11:07 − 9:45 =
[R]

f) 3:08 − 1:51 =
[R]

g) 10:28 − 8:30 =
[R]

h) 12:04 − 8:37 =
[R]

i) 3:36 − 1:22 =
[R]

j) 10:02 − 8:17 =
[R]