a) 9:18 − 7:14 =
[R]

b) 10:31 − 7:23 =
[R]

c) 6:01 − 3:11 =
[R]

d) 4:33 − 3:14 =
[R]

e) 4:13 − 1:07 =
[R]

f) 7:14 − 6:08 =
[R]

g) 7:18 − 5:38 =
[R]

h) 11:30 − 10:12 =
[R]

i) 4:14 − 2:04 =
[R]

j) 2:30 − 1:19 =
[R]