a) 7:19 − 5:10 =
[R]

b) 9:31 − 7:21 =
[R]

c) 11:11 − 8:16 =
[R]

d) 11:15 − 10:14 =
[R]

e) 10:34 − 9:08 =
[R]

f) 5:21 − 3:05 =
[R]

g) 8:45 − 5:04 =
[R]

h) 12:04 − 8:48 =
[R]

i) 11:12 − 9:30 =
[R]

j) 6:34 − 3:07 =
[R]