a) 3:23 − 2:06 =
[R]

b) 8:37 − 5:12 =
[R]

c) 11:28 − 10:22 =
[R]

d) 9:18 − 7:27 =
[R]

e) 6:14 − 2:21 =
[R]

f) 7:10 − 3:37 =
[R]

g) 7:43 − 5:05 =
[R]

h) 10:14 − 9:07 =
[R]

i) 9:03 − 6:44 =
[R]

j) 3:52 − 2:04 =
[R]