a) 4:44 − 2:07 =
[R]

b) 5:13 − 3:39 =
[R]

c) 10:39 − 9:12 =
[R]

d) 6:30 − 4:08 =
[R]

e) 10:37 − 8:00 =
[R]

f) 5:16 − 2:19 =
[R]

g) 11:24 − 10:14 =
[R]

h) 11:28 − 10:08 =
[R]

i) 9:31 − 8:02 =
[R]

j) 5:28 − 2:25 =
[R]