a) 8:26 − 5:07 =
[R]

b) 9:19 − 7:16 =
[R]

c) 10:23 − 7:03 =
[R]

d) 7:10 − 5:38 =
[R]

e) 4:39 − 2:19 =
[R]

f) 10:11 − 6:41 =
[R]

g) 7:40 − 4:08 =
[R]

h) 6:49 − 4:00 =
[R]

i) 11:17 − 7:21 =
[R]

j) 9:21 − 7:01 =
[R]