a) 9:23 − 5:31 =
[R]

b) 4:15 − 2:32 =
[R]

c) 10:13 − 7:46 =
[R]

d) 6:12 − 3:27 =
[R]

e) 2:14 − 1:04 =
[R]

f) 10:03 − 8:26 =
[R]

g) 5:30 − 3:22 =
[R]

h) 7:10 − 5:37 =
[R]

i) 3:05 − 1:40 =
[R]

j) 5:13 − 2:11 =
[R]