a) 3:32 − 2:05 =
[R]

b) 9:13 − 6:05 =
[R]

c) 3:33 − 1:25 =
[R]

d) 6:29 − 4:19 =
[R]

e) 8:04 − 4:10 =
[R]

f) 3:26 − 2:26 =
[R]

g) 3:12 − 1:21 =
[R]

h) 9:22 − 7:31 =
[R]

i) 8:17 − 6:15 =
[R]

j) 5:24 − 3:01 =
[R]